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anthropic-ai/sdk

v0.56.02.1M downloads/moanthropics/anthropic-sdk-php ↗New releases in your daily digest, changelog included.

Anthropic PHP SDK

Last release today
07 Oct 2026
Ships on a steady schedule
a new release about every 1 weeks
Nearly every release is documented
notes for 60 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
1 years old
61 releases · first in 2025

Release timeline

61 releases since 2025

20252026

One column per month.

Releases

v0.56.07 Oct 20262 sources agree
api: add claude-haiku-5-5 and typed computer and browser toolset tool calls
Features

api: add claude-haiku-5-5 and typed computer and browser toolset tool calls

api: add lifecycle stage fields and filter to /v1/models

Bug Fixes

client: refuse path parameters that form a "." or ".." path segment

Chores

api: update spend limit schemas

docs: describe a federation rule's target by its type

docs: fix example IDs in sessions, agents and vault credentials

docs: update Managed Agents multiagent and thread descriptions

docs: update the activity summaries endpoint description

internal: add REVIEW.md with review instructions

internal: bump phpstan to 2.2.13

internal: remove unused release configuration
Open source →
v0.55.06 Oct 2026Breaking2 sources agree
ci: compare breaking change detection against the last release

Features

api: add disabled to thinking types in model capabilities
api: add display_name to RBAC roles and deprecate name
api: add include_default parameter to list workspaces
api: add line to model objects
api: add url_sources to the Managed Agents web_fetch tool config
api: add web search and code execution support to model capabilities

Bug Fixes

api: send the beta header by default when listing spend limits
client: drop the AWS session token on cross-origin redirects (#256)
client: send array header params as a single comma-separated header
pagination: continue auto-paging past the first page

Chores

api: mark the Text Completions API as deprecated
ci: check that pull requests update the changelog
ci: compare breaking change detection against the last release
docs: correct example groups in rate limit list description
docs: correct when usage and cost report data becomes final
docs: update the description of the Model line field
internal: list imported phpstan types in order of first use
internal: tidy the doc comments of model constructors and of the SSE stream
tests: run tests skipped for a query param bug that is now fixed
tests: run tests that an older mock server could not serve

Documentation

api: state the agent tools limit as 256
fix the structured output example in the README
match buildRequest return type in Foundry and Mantle clients
php: remove a repeated comment from the file upload example in the README
php: use the PHP names of the request options in the README

v0.54.030 Sept 2026Deprecated2 sources agree

api: mark Claude Sonnet 4.5 as deprecated (end-of-life November 30, 2026)

0.54.0 (2026-09-30)

Full Changelog: v0.53.0...v0.54.0

Features

api: add list spend limits endpoint (1794c87)

Chores

api: mark Claude Sonnet 4.5 as deprecated (end-of-life November 30, 2026) (70cd75d)
client: deprecate sonnet 4.5 on bedrock / vertex (ba17fb4)
internal: make generated code pass newer phpstan versions (70cd75d)

Open source →

v0.53.030 Sept 20262 sources agree

api: add a refusal stop reason and stop_details to Managed Agents session idle events

0.53.0 (2026-09-30)

Full Changelog: v0.52.0...v0.53.0

Features

api: add a refusal stop reason and stop_details to Managed Agents session idle events (dbe2a7a)
api: add Claude Enterprise analytics, spend limits, and RBAC groups and roles to the Admin API (d6814d0)
api: add per-user usage and cost reports to the Admin API analytics (a04d8f3)
api: add Plugins and Plugin Marketplaces to the Admin API (3f22e51)
api: add repository error types to Managed Agents session errors (e60e647)
api: allow removing a plugin's org-wide installation setting (3b6398b)
api: MCP tunnels beta: add read-only transport object to Tunnel and return the one-time relay token in the create response (3c9236e)
api: Organization API endpoints are now GA (0611b83)

Bug Fixes

api: make memory store description, metadata, archived_at required (ebcc8b5)
api: type admin plugin preference and marketplace fields as enums (8739e6d)
pagination: auto-paging continues past an empty page while next_page is set (4d6c47f)

Chores

api: update MCP Tunnels types and descriptions (45168f1)
docs: remove placeholder enum descriptions (d4aaed3)

Documentation

examples: stop reading session events on any idle that needs no action (#250) (7302b11)

Open source →

v0.52.028 Sept 2026Deprecated2 sources agree

vertex: accept region, deprecate location

0.52.0 (2026-09-28)

Full Changelog: v0.51.0...v0.52.0

Features

api: add between_tools thinking type (4bf61e7)
api: add claude-sonnet-5-5 (0e38168)
api: add include_inherited and source to workspace rate limits (6bfd72b)
api: add typed event type values to the Managed Agents events list filter (fd60f4d)
api: cache diagnostics GA — diagnostics on Message / MessageCreateParams (be20d8a)
vertex: accept region, deprecate location (0502828)

Bug Fixes

bedrock,foundry: follow the messages contract in restricted message services (#239) (ff90d1f)
client: keep request paths that start with / on the base URL (30cab70)
client: send no placeholder filename for unnamed file uploads (ddac599)
helpers: degrade between_tools thinking to disabled on fallback hops (#244) (980bcdf)
streaming: deliver events as they arrive with the Guzzle client (760d6f2)

Chores

api: deprecate the betas param on GA models and completions methods (962dfba)
ci: choose the CI runner by repository (3dbe93a)
docs: clarify that stream: true returns the raw event stream (8bd22ba)
docs: make Managed Agents actor descriptions resource-neutral (84cb9a0)
docs: restore the research-preview notice on the Dream type (a243dee)

Documentation

api: prefer each field's own description over its shared type's (ec95056)

Open source →

v0.51.022 Sept 20262 sources agree

api: add support for claude-opus-5-5, inline tool definitions and MCP tool-list pinning (beta)

0.51.0 (2026-09-22)

Full Changelog: v0.50.0...v0.51.0

Features

api: add support for claude-opus-5-5, inline tool definitions and MCP tool-list pinning (beta) (0d6ea88)
php: add static with() constructors to discriminated unions (ca8fa1f)
tools: add compactBeforeNextTurn() to the tool runner (#228) (1501659)

Bug Fixes

api: share one evaluated_permission enum across Managed Agents events (dc060c1)
client: read tool definitions into the class their type names (761c22d)
php: limit static with() constructors to unions used in request params (d826535)
tools: addTools() takes effect straight away (#235) (e277760)
tools: leave reply-only params off the tool runner's compaction request (#234) (a65dec2)

Chores

docs: add descriptions to the Dreams API reference (a3fa7d2)
docs: add descriptions to the User Profiles API reference (a3fa7d2)
docs: add memory store descriptions to the Managed Agents API reference (a3fa7d2)
docs: improve descriptions in the Dreams API reference (ee3a9c9)
docs: remove placeholder parameter descriptions (8d16eb8)
docs: simplify the session thread agent type description (35d8451)
docs: update diagnostics field descriptions on beta messages (35c8916)

Documentation

add path and header parameter descriptions (801a12b)

Open source →

v0.50.018 Sept 2026Deprecated2 sources agree

api: add group with display_name to rate limits, deprecate group_type

0.50.0 (2026-09-18)

Full Changelog: v0.49.0...v0.50.0

Features

api: add group with display_name to rate limits, deprecate group_type (936b187)

Bug Fixes

bedrock: report AWS EventStream exception and error frames by name (#226) (e8c5aaa)
client: join multiple anthropic-beta values with a comma and no space (#227) (096c510)

Chores

docs: add descriptions for enum values and path parameters (3faa184)
docs: clarify the compaction tool_changes and tool change descriptions (1482980)

Open source →

v0.49.015 Sept 2026Deprecated2 sources agree

api: fix typo in temperature deprecation message

0.49.0 (2026-09-15)

Full Changelog: v0.48.0...v0.49.0

Features

api: add compaction parameter and signed compaction blocks (beta) (a6569e1)
api: add enum types for workspace data-residency geo fields (ae759fa)
api: add thinking_mismatch_allowed entries to input_transformations (beta) (7f51166)
api: add url_sources to the web fetch tool (a1c309f)
api: add workspace_id parameter to user profiles methods (e0a3141)

Bug Fixes

api: mark usage iteration model as nullable (f61a249)
api: use one input transformation type for message and delta event (a4b1807)
client: decode timestamps as dates in unions with a string variant (e4ab631)
client: send uploads from non-seekable streams once instead of failing on retry (b412f0b)

Chores

docs: clarify that session_thread_id on tool use events is informational (29f1895)
docs: correct the compaction beta's parameter descriptions (2672f33)
tests: stop the mock server without failing a passing test run (8be1b0b)

Documentation

api: clarify usage.iterations entry typing under server-side fallback (14fa132)
api: fix typo in temperature deprecation message (466e602)
stop documenting unions with their first variant's description (4c18bd8)

Open source →

v0.48.010 Sept 20262 sources agree

api: add auto mode tool permissions for Managed Agents

0.48.0 (2026-09-10)

Full Changelog: v0.47.0...v0.48.0

Features

api: add auto mode tool permissions for Managed Agents (f9f9434)
api: add content_too_large web_fetch tool error code (bcb781b)
api: add the user-profiles-2026-09-04 beta value and external_user_details to user profiles (33d3ed1)
api: support mounting public GitHub repositories without an authorization_token in Managed Agents sessions (b65b29e)

Chores

docs: correct the environment scope field description (3549c57)
internal: restore package version (#216) (127ca6a)
internal: restore package version (#217) (0a28b14)
internal: stop stamping the package version into generated files (c5a95ae)

Open source →

v0.47.04 Sept 2026

api: add Claude Tag category and user breakdowns to usage reports

0.47.0 (2026-09-04)

Full Changelog: v0.46.0...v0.47.0

Features

api: add Claude Tag category and user breakdowns to usage reports (a6f4b54)
api: add named types for organization compliance settings state (faa3716)
api: add workspace_id request option for multi-workspace credentials (9fca8fc)
api: raise Managed Agents vault refresh token limit to 8192 chars (2824211)

Bug Fixes

api: remove response text block maxLength constraint (4a4289a)
client: keep empty JSON objects when Bedrock and Vertex rewrite the request body (#210) (6231378)
client: say which package to install when no HTTP client is found (37aa520)
errors: keep non-JSON error bodies in APIStatusException (5b72b0d)
models: json_encode an empty model as {} instead of a TypeError (4400c3d)

Chores

api: accept anthropic-version on Claude Enterprise admin endpoints (893c6d6)
api: declare specific error statuses instead of a generic 4XX response (79018ea)
api: update authentication parameters on spend limit create and delete (77a39fd)
ci: cache Go build output in the build job (97f6eff)
docs: fix broken session link in memory version descriptions (3796f8a)
docs: note that value object arguments must be set by name (0dd790c)
examples: refresh platform model IDs (#198) (902bb9e)
internal: fix spec repo README link and drop its mock script (956e0fc)
internal: read formatter versions from one place (9fca8fc)
internal: remove redundant type comments in request body handling (2de0a83)
internal: update CODEOWNERS (e10f3a0)
internal: update CODEOWNERS (956e0fc)
refactor: split the client tests (61b721d)
tests: narrow the serialized tool definition before indexing it (#214) (f12bad7)
tests: reword the skip reason on the path-level query param tests (c1f04a7)

Documentation

api: add HTTP reference for the remaining Admin API endpoints (03266f2)

Open source →

Additional notes

Full Changelog: v0.46.0...v0.47.0

Features

api: add Claude Tag category and user breakdowns to usage reports (a6f4b54)
api: add named types for organization compliance settings state (faa3716)
api: add workspace_id request option for multi-workspace credentials (9fca8fc)
api: raise Managed Agents vault refresh token limit to 8192 chars (2824211)
client: keep vault credential secrets out of Terraform state with write-only arguments (956e0fc)

Bug Fixes

api: remove response text block maxLength constraint (4a4289a)
client: keep empty JSON objects when Bedrock and Vertex rewrite the request body (#210) (6231378)
client: raise a clear error when an httpx object is passed instead of an httpx2 one (03266f2)
client: say which package to install when no HTTP client is found (37aa520)
errors: keep non-JSON error bodies in APIStatusException (5b72b0d)
models: json_encode an empty model as {} instead of a TypeError (4400c3d)

Chores

api: accept anthropic-version on Claude Enterprise admin endpoints (893c6d6)
api: declare specific error statuses instead of a generic 4XX response (79018ea)
api: update authentication parameters on spend limit create and delete (77a39fd)
ci: cache Go build output in the build job (97f6eff)
docs: fix broken session link in memory version descriptions (3796f8a)
docs: note that value object arguments must be set by name (0dd790c)
examples: refresh platform model IDs (#198) (902bb9e)
internal: fix spec repo README link and drop its mock script (956e0fc)
internal: read formatter versions from one place (9fca8fc)
internal: remove redundant type comments in request body handling (2de0a83)
internal: update CODEOWNERS (e10f3a0)
internal: update CODEOWNERS (956e0fc)
refactor: split the client tests (61b721d)
tests: narrow the serialized tool definition before indexing it (#214) (f12bad7)
tests: reword the skip reason on the path-level query param tests (c1f04a7)

Documentation

api: add HTTP reference for the remaining Admin API endpoints (03266f2)

v0.46.01 Sept 20262 sources agree

api: add support for claude-fable-5-1 and claude-mythos-5-1

0.46.0 (2026-09-01)

Full Changelog: v0.45.0...v0.46.0

Features

api: add support for claude-fable-5-1 and claude-mythos-5-1 (cad1be2)

Bug Fixes

api: remove unsupported allowed_callers from the toolset entries (608b335)

Chores

docs: clarify disallowed characters in memory paths (0530f91)

Documentation

api: describe external_key_id and compartment_id behavior on Claude Platform on AWS (f013779)
changelog: detail the beta files/skills GA-shape change (232ecef)
changelog: use this SDK's names in the beta files/skills entry (b9bcd90)

Open source →

v0.45.031 Aug 2026

api: add beta webhooks parse_unverified; unwrap now verifies signatures

0.45.0 (2026-08-31)

Full Changelog: v0.44.0...v0.45.0

Features

api: add beta webhooks parse_unverified; unwrap now verifies signatures (eb701fa)
api: add support for organization compliance settings in the Admin API (42c09e2)
api: beta files/skills namespaces use GA shapes; drop dated beta header pins (e221c18)
user_profiles: sort the user profile list by name with order_by=name (48bf551)

Bug Fixes

api: mark the beta header required on Admin API Tunnel operations (cba198a)
pagination: follow the requested paging direction past page 1 (101257d)
pagination: page backward with before_id and stop on has_more false or an empty page (101257d)
pagination: request the next page only with items, has_more, and the cursor for the request's direction (101257d)

Chores

api: remove unreleased thinking prefix_mismatched_behavior param (a714a2b)
api: remove user profile relationship in favor of access_type (a714a2b)
internal: add UnionDiscriminator marker for response unions (61b81cc)
internal: remove discriminator support from PropertyInfo (42c09e2)

Documentation

api: backtick identifiers in managed-agents API descriptions (93e8aec)

Open source →

Additional notes

Full Changelog: v0.44.0...v0.45.0

Features

api: add beta webhooks parse_unverified; unwrap now verifies signatures (eb701fa)
api: add support for organization compliance settings in the Admin API (42c09e2)
api: beta files/skills namespaces use GA shapes; drop dated beta header pins (e221c18)

The beta Files and Skills services ($client->beta->files, $client->beta->skills) no longer send the files-api-2025-04-14 / skills-2025-10-02 headers and return the same shapes as $client->files / $client->skills (as Anthropic\Beta\… classes). Requests that still send those headers on raw HTTP keep receiving the beta shapes.

Changes in the beta services:
- $client->beta->skills->delete($skillID) now deletes a Skill together with all of its versions (previously refused while any version existed). It returns Anthropic\Beta\Skills\BetaDeletedSkill (was SkillDeleteResponse).
- Beta Messages class Anthropic\Beta\Messages\BetaSkill (container skill reference with skillID, type, version) is renamed BetaContainerSkill. Anthropic\Beta\Skills\BetaSkill now names the Skill object returned by create() / retrieve() / list() (replacing SkillNewResponse / SkillGetResponse / SkillListResponse), and skill versions are Anthropic\Beta\Skills\Versions\SkillVersion / DeletedSkillVersion (replacing Version*Response).
- $client->beta->files->list() returns an Anthropic\PageCursor (with data / nextPage) and paginates with page / ids (was an Anthropic\Page with data, hasMore, firstID, lastID and beforeID / afterID); pagingEachItem() is unchanged. BetaSkill uses displayName (was displayTitle, also the create() parameter) and latestVersionID (was latestVersion), and SkillVersion is addressed by its skver_… id (the Unix-timestamp version property is gone).
Migration guides: Migrate from files-api-2025-04-14 · Migrate from skills-2025-10-02
user_profiles: sort the user profile list by name with order_by=name (48bf551)

Bug Fixes

api: mark the beta header required on Admin API Tunnel operations (cba198a)
pagination: follow the requested paging direction past page 1 (101257d)
pagination: page backward with before_id and stop on has_more false or an empty page (101257d)
pagination: request the next page only with items, has_more, and the cursor for the request's direction (101257d)

Chores

api: remove unreleased thinking prefix_mismatched_behavior param (a714a2b)
api: remove user profile relationship in favor of access_type (a714a2b)
internal: add UnionDiscriminator marker for response unions (61b81cc)
internal: remove discriminator support from PropertyInfo (42c09e2)

Documentation

api: backtick identifiers in managed-agents API descriptions (93e8aec)

v0.44.026 Aug 20262 sources agree

api: add missing public beta values to the AnthropicBeta enum

0.44.0 (2026-08-26)

Full Changelog: v0.43.0...v0.44.0

Features

api: add missing public beta values to the AnthropicBeta enum (fbfd3fa)
api: add SessionThreadAgentEntry type for a session thread's agent (4c3b632)
api: add the Admin API organization resources under client.beta.organization (c43ac6b)
api: add thinking-display-updates beta (20124c2)

Bug Fixes

client: honor profile base_url from the config store (#175) (936b35b)
client: read omitted response properties as null instead of throwing (b713422)
client: reuse stored user_oauth access token and re-read credentials before refreshing (#176) (96b2cb9)

Chores

ci: cancel the CI run of an older push when a newer one arrives (dc85d4c)
docs: clarify how long memory versions are retained (a8d1b04)
docs: clarify that skill-version delete and download don't accept 'latest' (51dbe2f)
docs: note allow_package_managers requirement for packages (affd04d)
internal: move embedded mock-server spec to a sidecar file (51dbe2f)

Open source →

v0.43.020 Aug 20262 sources agree

api: add input_transformations to beta message responses; default to the user-profiles-2026-08-18 beta

0.43.0 (2026-08-20)

Full Changelog: v0.42.0...v0.43.0

Features

api: add input_transformations to beta message responses; default to the user-profiles-2026-08-18 beta (dc61a98)
api: add support for message threads (beta) (9b3febc)
api: add tool configuration for Managed Agents toolsets (a163631)
api: additions to files and memory stores (c84d91b)
api: Files and Skills APIs are now GA; add computer use and browser use toolsets (eccbd6c)

Bug Fixes

api: remove unsupported mid_conv_system content block (d0940d2)
bedrock,foundry: follow MessageCreateParamsContainer rename in restricted services (#170) (#188) (e2d278b)
bedrock,vertex: preserve encoded query params (#178) (#187) (8623ab9)
client: do not send schema defaults for omitted optional params (070d76b)
tool-runner: forward the server-assigned container on follow-up requests (#160) (0a9497c)
tool-runner: stop on refusal instead of executing tools (#144) (70040a2)

Chores

api: expose Managed Agents per-tool config types at top level (2a50464)
api: share the computer use and browser use toolset config models (dc61a98)
deps: bump mcp/sdk dev dependency (f436e41)
use model enum constants in generated examples and tests (e72da8b)

Documentation

api: describe what a resolved skill reference's version carries (3bb98d9)
examples: use GA files resource in agents file example (#169) (#186) (0d111a2)

Open source →

v0.42.013 Aug 20262 sources agree

api: add output_behavior to dream creation (create a new memory store or update the input store in place)

0.42.0 (2026-08-13)

Full Changelog: v0.41.0...v0.42.0

Features

api: add output_behavior to dream creation (create a new memory store or update the input store in place) (3def5a2)

Bug Fixes

client: add models (2a6eebf)
streaming: apply all message_delta fields when accumulating streamed messages (#140) (4fff7e7)

Documentation

api: clarify that user profile name is optional for resold profiles (87420c9)

Open source →

v0.41.06 Aug 20262 sources agree

api: add mid-conversation-tool-changes-2026-07-01 beta

0.41.0 (2026-08-06)

Full Changelog: v0.40.0...v0.41.0

Features

api: add mid-conversation-tool-changes-2026-07-01 beta (6cdad3e)
api: add support for session budgets, advisor tool, pinned inference location and skills auto-loading from GitHub (37531b2)

Bug Fixes

client: improve http-discovery error message (3be4d22)

Chores

api: remove retired Claude Opus 4.1 models (625f364)
docs: small updates to descriptions (a2c07ea)
docs: updates to a few documentation strings (e497b81)

Open source →

v0.40.024 Jul 20262 sources agree

api: add tool addition/removal blocks and tool_change events

0.40.0 (2026-07-24)

Full Changelog: v0.39.0...v0.40.0

Features

api: add claude-opus-5 model (950d91f)
api: add tool addition/removal blocks and tool_change events (950d91f)
api: expand client-side fallback credit token types and add server-side fallbacks default option (950d91f)

Open source →

v0.37.016 Jul 20262 sources agree

api: add support for MCP Tunnels

0.37.0 (2026-07-16)

Full Changelog: v0.36.0...v0.37.0

Features

api: add support for dreaming (68645d3)
api: add support for MCP Tunnels (2214a96)
helpers: add session delta accumulator for agent.message previews (#94) (52a6a82)

Chores

docs: small updates to field descriptions (3a331f9)
docs: update model example (1768ac3)
docs: updates to descriptions and examples (9f43c7c)

Open source →

v0.35.01 Jul 2026

client: add client-side fallbacks middleware for API providers that do not support server-side fallbacks

Full Changelog: v0.34.0...v0.35.0

Features

client: add client-side fallbacks middleware for API providers that do not support server-side fallbacks (#54) (bd05781)
client: optionally pass the attempt's RequestOptions to middleware (#97) (64de73e)

Open source →

v0.34.030 Jun 2026

api: add support for Managed Agents event delta streaming, agent overrides, reverse pagination, vault credential injection scoping, and agent and depl

Full Changelog: v0.33.0...v0.34.0

Features

api: add support for Managed Agents event delta streaming, agent overrides, reverse pagination, vault credential injection scoping, and agent and deployment webhook events (a0e1ba3)
api: api update (#90) (17348ea)

Open source →

v0.32.029 Jun 2026

api: add support for 20260318 web fetch and support tools

Full Changelog: v0.31.0...v0.32.0

Features

api: add support for 20260318 web fetch and support tools (7656043)

Bug Fixes

bedrock,vertex: run provider rewrites as middleware (reapply) (#77) (0961a4d)

Chores

api: accept user profile ID's when counting tokens (12154bd)
docs: updates to descriptions and example values (a0b6eb7)

Open source →

v0.31.024 Jun 2026

client: add support for system.message streaming events

Full Changelog: v0.30.0...v0.31.0

Features

client: add support for system.message streaming events (a665f06)
helpers: single source for x-stainless-helper + tag the BetaToolRunner (#63) (ba6ce02)

Bug Fixes

bedrock,vertex: run provider rewrites as middleware (#60) (2343067)

Chores

api: add support for new refusal category (ae875c2)
api: add support for sending User Profile ID in request headers (521f220)

Open source →

v0.30.018 Jun 2026

api: add support for new code_execution_20260120 tool

Full Changelog: v0.29.2...v0.30.0

Features

api: add support for new code_execution_20260120 tool (08d80b7)
client: request middleware (#35) (0a05e5c)

Bug Fixes

client: merge extraBodyParams into the request body (#53) (08035a9)
client: preserve client-level options over request-level defaults (a8c61c4)
Merge extraBodyParams into the body with the same precedence as extraHeaders (extras win on collision). Lives in Util::mergeBody because the body at that layer is one of four shapes (assoc array, stdClass, list, null) and only map-shaped bodies are merged into; lists and scalars pass through. Five unit tests pin the shape matrix. (08035a9)
streaming: return error statuses instead of throwing (4e1d617)
vertex: do not send stream: false (c38340e)

Chores

client: add early return when no extraBody is specified (d79eb94)

Open source →

v0.26.05 Jun 2026Deprecated

api: mark Claude Opus 4.1 as deprecated

Full Changelog: v0.25.0...v0.26.0

Features

api: mark Claude Opus 4.1 as deprecated (a9ddf0b)

Chores

internal: update private repo name (02d07c0)
pin phpstan to 2.2.1 (#16) (f99bcb4)

Documentation

point security reports to Anthropic's HackerOne program (#7) (d219722)

Open source →

v0.25.028 May 2026

api: Add support for claude-opus-4-8, mid-conversation system blocks, and usage.output_tokens_details

Full Changelog: v0.24.0...v0.25.0

Features

api: Add support for claude-opus-4-8, mid-conversation system blocks, and usage.output_tokens_details (80e5ce5)

Documentation

replace literal newlines (6a98894)

Open source →

v0.22.013 May 2026

api: Add BetaManagedAgentsSearchResultBlock types

Full Changelog: v0.21.0...v0.22.0

Features

api: Add BetaManagedAgentsSearchResultBlock types (f29c016)
api: Add support for cache diagnostics beta (c47486d)

Bug Fixes

guzzle requires special handling to enable streaming (248a5aa)

Chores

api: spec updates (32638ec)
ci: resolve pin conflict from stainless#18197 (#626) (550410c)

Open source →

v0.21.011 May 2026

aws: Add AWS client for Claude Platform on AWS

Full Changelog: v0.20.0...v0.21.0

Features

aws: Add AWS client for Claude Platform on AWS (c56e7ad)

Bug Fixes

client: address bug with PageCursor not advancing past first page (#613) (6e9982f)
client: prevent betas request param being silently overridden by per-endpoint extraHeaders default (#615) (cacb6da)

Chores

ci: Pin GitHub Actions to commit SHAs (#37) (0d232d4)

Open source →

v0.18.04 May 2026

api: improve Managed Agents APIs

Full Changelog: v0.17.1...v0.18.0

Features

api: improve Managed Agents APIs (56c1d24)
client: add Workload Identity Federation, interactive OAuth, and auth profiles (2bc875e)
mcp: add mcp tool helpers (#561) (d5176bf)
support setting headers via env (51490da)

Open source →

v0.17.023 Apr 2026

client: resolve serialization issue with unions and enums

Full Changelog: v0.16.0...v0.17.0

Features

api: CMA Memory public beta (b313ec0)

Bug Fixes

api: fix errors in api spec (a4e0699)
api: restore missing features (34e585e)
client: resolve serialization issue with unions and enums (c9795cd)
populate enum-typed properties with enum instances (6c0d3de)

Chores

tests: bump steady to v0.22.1 (fe9a8f0)

Open source →

v0.15.014 Apr 2026Deprecated

deprecate sonnet 4 and opus 4 models

Full Changelog: v0.14.0...v0.15.0

Features

bedrock: use auth header for mantle client (#511) (b2bb5f9)
client: enable upload methods (5a65b0f)

Bug Fixes

lint: remove dead code flagged by PHPStan 2.1.47 (#534) (0393a38)
streaming: add missing events (e06bf16)

Chores

ci: remove release-doctor workflow (c444c6f)
deprecate sonnet 4 and opus 4 models (#540) (30b12fa)
docs: add 2 more examples on how to use the agents API (#537) (b234398)

Open source →

v0.9.01 Apr 2026

add error type field to APIStatusException

Full Changelog: v0.8.0...v0.9.0

Features

add error type field to APIStatusException (#457) (c889d8e)
api: add structured stop_details to message responses (80151ce)
prepare aws package (#471) (de64488)
support API key auth in Bedrock (#490) (ee2528d)

Bug Fixes

exclude parsed from TextBlock serialization (#466) (f3053e5), closes #465

Chores

internal: update multipart form array serialization (12b1028)
tests: bump steady to v0.19.4 (f257675)
tests: bump steady to v0.19.5 (dea677e)
tests: bump steady to v0.19.6 (c708ab5)
tests: bump steady to v0.19.7 (88d31c8)
tests: bump steady to v0.20.1 (e9324d3)
tests: bump steady to v0.20.2 (0f9de36)

Open source →

v0.8.018 Mar 2026

internal: remove Bedrock/Vertex/Foundry clients, structured output, update model capabilities

Full Changelog: v0.7.0...v0.8.0

Features

api: manual updates (7267a19)

Bug Fixes

resolve lint error (#452) (9564625)

Chores

internal: remove Bedrock/Vertex/Foundry clients, structured output, update model capabilities (2fae870)
internal: tweak CI branches (05c72ad)

Open source →

v0.7.016 Mar 2026

add structured output helpers for messages

Full Changelog: v0.6.0...v0.7.0

Features

add beta tool runner (#324) (57a3df6)
add structured output helpers for messages (#302) (a8685fc)
api: chore(config): clean up model enum list (#31) (c9b776b)
api: GA thinking-display-setting (00fc5a5)
tests: update mock server (97fdd5b)

Bug Fixes

client: update thinking config from enabled to adaptive and remove budgetTokens (#401) (12e8e41)
remove broken methods (13776b6)
restore x-release-please-start-version markers in README (#320) (1052efc)

Chores

internal: codegen related update (9e16dc8)
internal: codegen related update (03f7bb7)
internal: upgrade phpunit (ac75d97)
tests: unskip tests that are now supported in steady (319997a)

Open source →

v0.6.019 Feb 2026

api: add support for speed mode

Full Changelog: v0.5.0...v0.6.0

Features

add Bedrock client (#273) (cf8b733)
add Foundry client (#307) (8ccd093)
add Vertex client (#264) (d7d87ad)
api: add support for speed mode (955855c)
api: Add top-level cache control (automatic caching) (b98536b)
api: fix shared UserLocation and error code types (db15b55)
api: manual updates (3ce2054)
api: Release Claude Opus 4.6, adaptive thinking, and other features (439fcf8)
api: Releasing claude-sonnet-4-6 (78fda97)
use $_ENV aware getenv helper (c40668b)
warn when thinking is enabled for certain models (#305) (e306169)

Bug Fixes

add backward-compat class_alias stubs for renamed UserLocation and ErrorCode types (#319) (e470d01)
add type declaration to avoid lint error (#311) (2b8765d)
api: fix spec errors (f57e850)
ci: use correct GitHub URL for Packagist notification (#14) (ef0a1dc)

Chores

add exception message to Util::getenv() and add tests (#309) (451a3d4)
add usage sections for the Bedrock and Vertex clients (#303) (a8b5419)
ci: Remove claude code review (#17) (df06300)
client: update model name (dac28a0)
integrate latest API updates into Bedrock and Vertex clients (#308) (0f33eec)
internal: php cs fixer should not be memory limited (cbc55ad)
update mock server docs (13e0170)

Documentation

streamline and standardize docs (#313) (efc3d16)

Open source →

v0.5.030 Jan 2026

replace special flag type omittable with just null

Full Changelog: v0.4.0...v0.5.0

⚠ BREAKING CHANGES

replace special flag type omittable with just null
use camel casing for all class properties

Features

add BaseResponse class for accessing raw responses (b803fb8)
add idempotency header support (113b79f)
add setters to constant parameters (a476273)
allow both model class instances and arrays in setters (71aa7fc)
api: add support for Structured Outputs in the Messages API (9fd43ce)
api: migrate sending message format in output_config rather than output_format (d334157)
better support for pagination mechanisms (829ee6e)
improved phpstan type annotations (cc981bb)
replace special flag type omittable with just null (e1137de)
simplify and make the phpstan types more consistent (9f536fe)
split out services into normal & raw types (5ba5dbf)
support unwrapping envelopes (0ed53db)
use camel casing for all class properties (90f0805)

Bug Fixes

a number of serialization errors (e318451)
correctly serialize dates (af8260d)
support arrays in query param construction (779413f)
typos in README.md (cb61dee)

Chores

add git attributes and composer lock file (006c7c2)
be more targeted in suppressing superfluous linter warnings (4b8cbf5)
ci: Add Claude Code GitHub Workflow (#240) (4fd215b)
ensure constant values are marked as optional in array types (66cf88c)
formatting (5878c16)
internal: add a basic client test (8835b21)
internal: codegen related update (1c218af)
internal: codegen related update (7240372)
internal: codegen related update (9557a1c)
internal: codegen related update (a8a13ec)
internal: codegen related update (e2bebf6)
internal: codegen related update (213c670)
internal: codegen related update (2d460ff)
internal: codegen related update (6087933)
internal: codegen related update (3e5e21a)
internal: codegen related update (ee26b2b)
internal: codegen related update (b3411dd)
internal: codegen related update (e98bd62)
internal: codegen related update (94d88c4)
internal: ignore stainless-internal artifacts (b144935)
internal: improve pagination tests (94f8bc8)
internal: minor test script reformatting (e27d068)
internal: refactor auth by moving concern from base client into client (af7b192)
internal: update actions/checkout version (212b762)
internal: update phpstan comments (f0f7ddf)
readme: remove beta warning now that we're in ga (ca60a4b)
support jsonl streaming (b350cbc)
switch from #[Api(optional: true|false)] to #[Required]|#[Optional] for annotations (f938919)
update examples (eef6daf)
use $self = clone $this; instead of $obj = clone $this; (1607f76)
use non-trivial test assertions (c223976)
use single quote strings (441785c)

Open source →

v0.4.024 Nov 2025Deprecated

api: mark older sonnet models as deprecated

Full Changelog: v0.3.0...v0.4.0

⚠ BREAKING CHANGES

client: redesign methods
remove confusing toArray() alias to __serialize() in favour of toProperties()
expose services and service contracts

Features

api: add ability to clear thinking in context management (99617c4)
api: add support for structured outputs beta (b3c80f7)
api: adding support for agent skills (471dd50)
api: adds support for Claude Opus 4.5, Effort, Advance Tool Use Features, Autocompaction, and Computer Use v5 (1e73c3d)
api: adds support for Claude Sonnet 4.5 and context management features (74e2d73)
api: adds support for Documents in tool results (f98a2d4)
api: adds support for web_fetch_20250910 tool (6159be3)
api: manual updates (bc265c5)
client: add raw methods (64d6f33)
client: redesign methods (b00b0d8)
client: support raw responses (1c8b9ee)
client: use real enums (29faa11)
expose services and service contracts (2c99ab5)
remove confusing toArray() alias to __serialize() in favour of toProperties() (d12c426)

Bug Fixes

ci: release doctor workflow (215237e)
decorate with enum label for all enum classes (e3c3890)
ensure auth methods return non-nullable arrays (bb1ed82)
inverted retry condition (300bcf1)
phpStan linter errors (02fce13)

Chores

add license (00cc634)
api: mark older sonnet models as deprecated (76fdfa8)
cleanup streaming (26d89eb)
client: add context-management-2025-06-27 beta header (276d908)
client: add model-context-window-exceeded-2025-08-26 beta header (1ab3668)
client: send metadata headers (cd895d4)
docs: update readme formatting (041acbb)
document parameter object usage (47d4c9b)
fix lints in UnionOf (b57e2c7)
internal: codegen related update (46489b1)
internal: codegen related update (2859486)
internal: fix tests (bc714d4)
internal: refactor base client internals (08252f7)
make more targeted phpstan ignores (00a1680)
refactor methods (1d7489e)
update examples (#191) (5c3819a)
use pascal case for phpstan typedefs (034b6b0)

Open source →

v0.3.02 Sept 2025

use builders for RequestOptions

Full Changelog: v0.2.0...v0.3.0

⚠ BREAKING CHANGES

use builders for RequestOptions

Features

client: adds support for code-execution-2025-08-26 tool (99a5428)
expose streams and pages in the public namespace (41382e4)
use builders for RequestOptions (fd0c23a)

Bug Fixes

remove inaccurate license field in composer.json (5296a0d)

Chores

add additional php doc tags (55cc35f)
refactor request options (1029de6)
refactor: simplify base page interface (4a69adf)
remove php-http/multipart-stream-builder as a required dependency (bd27c94)
simplify model initialization (bc0e44f)

Open source →

v0.2.027 Aug 2025

Full Changelog: v0.1.0...v0.2.0 ### ⚠ BREAKING CHANGES * rename errors to exceptions ### Features * rename errors to exceptions (8bbf53a) ### Bug Fixe

Full Changelog: v0.1.0...v0.2.0

⚠ BREAKING CHANGES

rename errors to exceptions

Features

rename errors to exceptions (8bbf53a)

Bug Fixes

add create release workflow (6455528)

Chores

improve streaming example (#110) (c9025f7)

Open source →