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@anthropic-ai/sdk

0.131.0anthropics/anthropic-sdk-typescript ↗New releases in your daily digest, changelog included.

The official TypeScript library for the Anthropic API

Last release 4 days ago
30 Sep 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Nothing withdrawn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
4 years old
211 releases · first in 2023

Release timeline

211 releases since 2023

2023202420252026

20232026

One column per quarter.

Releases

0.131.030 Sept 20262 sources agree
api: add list spend limits endpoint
0.131.0 (2026-09-30)

Full Changelog: sdk-v0.130.0...sdk-v0.131.0

Features

api: add list spend limits endpoint (cfb78c8)

Chores

client: deprecate sonnet 4.5 (d72cfaf)
Open source →
0.130.030 Sept 20262 sources agree
api: add a refusal stop reason and stop_details to Managed Agents session idle events
0.130.0 (2026-09-30)

Full Changelog: sdk-v0.129.0...sdk-v0.130.0

Features

api: add a refusal stop reason and stop_details to Managed Agents session idle events (5cd6910)

api: add Claude Enterprise analytics, spend limits, and RBAC groups and roles to the Admin API (109c766)

api: add per-user usage and cost reports to the Admin API analytics (0a74a28)

api: add Plugins and Plugin Marketplaces to the Admin API (40c2160)

api: add repository error types to Managed Agents session errors (6735615)

api: allow removing a plugin's org-wide installation setting (c7d120f)

api: MCP tunnels beta: add read-only transport object to Tunnel and return the one-time relay token in the create response (b0e57ce)

api: Organization API endpoints are now GA (1a1fd8f)

Bug Fixes

api: make memory store description, metadata, archived_at required (ed68900)

api: type admin plugin preference and marketplace fields as enums (942ae01)

pagination: auto-paging continues past an empty page while next_page is set (2d75266)

tool-runner: only send API fields for runnable tools (#404) (a62c2a2)

tools: stop the session tool runner after any idle that ends the turn (#878) (cab32f8)

Chores

api: update MCP Tunnels types and descriptions (394d60c)

docs: remove placeholder enum descriptions (04f0812)

tests: fixture update (#381) (9cfe4d4)

0.129.028 Sept 2026Deprecated2 sources agree

api: deprecate the betas param on GA models and completions methods

0.129.0 (2026-09-28)

Full Changelog: sdk-v0.128.0...sdk-v0.129.0

Features

api: add between_tools thinking type (ab51075)
api: add claude-sonnet-5-5 (4e77366)
api: add ClientToolUnion type for client-executed tools (2c1d2d7)
api: add include_inherited and source to workspace rate limits (66e925e)
api: add typed event type values to the Managed Agents events list filter (8ac4a26)
api: cache diagnostics GA — diagnostics on Message / MessageCreateParams (5ba5f29)
tools: optionally start tool calls while the reply streams (083969b)

Bug Fixes

client: also send X-Stainless-Timeout for client-level timeouts (b84783b)
client: send upload filenames as given, with no placeholder (f9d3e98)
helpers: degrade between_tools thinking to disabled on fallback hops (#841) (edbbf05)
internal: let bundlers drop unused classes with more than ten private-member assignments (67c7adb)
streaming: show every complete array item and hold back unfinished numbers in partial tool input (#781) (5806588)

Performance Improvements

streaming: drop the redundant iterSSEChunks layer (0357f81)
streaming: take each string token as one slice in the partial JSON tokenizer (#255) (cdfb1e5)

Chores

api: deprecate the betas param on GA models and completions methods (5c74e45)
api: list the known model ids first in the Model types (9452822)
ci: choose the CI runner by repository (33db1ec)
docs: clarify that stream: true returns the raw event stream (4286c22)
docs: make Managed Agents actor descriptions resource-neutral (15733f9)
docs: restore the research-preview notice on the Dream type (b32f8ba)
internal: move old constants around (0cd8edf)
tests: add diagnostics to the parser test's Message fixtures (eb5ca58)
tools: remove client-side compaction control (#802) (9c3e8a5)

Documentation

api: prefer each field's own description over its shared type's (5193478)
expand CLAUDE.md into a full contributor guide (98d2ddb)

Open source →

0.128.022 Sept 20262 sources agree

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

0.128.0 (2026-09-22)

Full Changelog: sdk-v0.127.0...sdk-v0.128.0

Features

api: add support for claude-opus-5-5, inline tool definitions and MCP tool-list pinning (beta) (eff2748)

Bug Fixes

api: share one evaluated_permission enum across Managed Agents events (0c1cc0f)
tools: addTools() takes effect straight away (#773) (1ccdad0)
tools: leave reply-only params off the tool runner's compaction request (#769) (8afc336)

Chores

docs: add descriptions to the Dreams API reference (ea4ddd1)
docs: add descriptions to the User Profiles API reference (ea4ddd1)
docs: add memory store descriptions to the Managed Agents API reference (ea4ddd1)
docs: improve descriptions in the Dreams API reference (971c54a)
docs: simplify the session thread agent type description (ccf71a2)
docs: update diagnostics field descriptions on beta messages (c0b8746)
internal: add property-based tests for partial JSON parsing (#776) (3ffac09)

Open source →

0.127.018 Sept 2026Deprecated2 sources agree

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

0.127.0 (2026-09-18)

Full Changelog: sdk-v0.126.0...sdk-v0.127.0

Features

api: add group with display_name to rate limits, deprecate group_type (2575d97)
tools: add compactBeforeNextTurn() to the tool runner (#682) (9f75ca6)

Bug Fixes

BetaMessageStream: stop coercing a null compaction_delta content into "null" (#655) (dbd6845)
client: don't retry requests whose body is a stream or iterator (eebc1b9)
client: join multiple anthropic-beta values with a comma and no space (#638) (e0cb1ff)
client: make pagination exports on the client namespace type-only (5adea1f)
internal: drop jest from tsconfig types (60588af)
middleware: echo a streamed compaction summary in the fallback continuation (#657) (2e0f004)
tools: keep $defs when transformJSONSchema root is a $ref (#687) (57a9f30)

Performance Improvements

client: skip formatting request details when debug logging is off (2b29ed2)

Chores

ci: publish releases from Node 24 with its bundled npm (6b3c6f5)
docs: add descriptions for enum values and path parameters (cb254c4)
docs: clarify the compaction tool_changes and tool change descriptions (5a695eb)
internal: build the sub-packages with TypeScript 6.0.3 (8a69ff5)
internal: build with TypeScript 6.0.3 and typescript-eslint 8.58.0 (01f3ee6)
internal: keep lib/internal out of the published exports map (763fb43)
internal: re-export pagination classes with a plain export list (c77bdc3)
internal: share a single Simplify type util (31d5e75)
internal: switch unit tests from jest to vitest (110542d, 788c9c6)

Open source →

0.126.015 Sept 2026Deprecated2 sources agree

internal: move tsconfig off settings deprecated in TypeScript 6

0.126.0 (2026-09-15)

Full Changelog: sdk-v0.125.0...sdk-v0.126.0

Features

api: add auto mode tool permissions for Managed Agents (7829b43)
api: add compaction parameter and signed compaction blocks (beta) (05fd878)
api: add enum types for workspace data-residency geo fields (89c5920)
api: add thinking_mismatch_allowed entries to input_transformations (beta) (1f32871)
api: add url_sources to the web fetch tool (ee23dd2)
api: add workspace_id parameter to user profiles methods (f5b9fb7)

Bug Fixes

api: mark usage iteration model as nullable (bec3bec)
api: use one input transformation type for message and delta event (e016d25)
client: ignore invalid Retry-After values and validate maxRetries (7829b43)
client: retry connection errors in the async client and stop blocking in the coroutine retry loop (7829b43)
client: stop waiting for a retry as soon as the request is aborted (941aaea)
client: use the default backoff when Retry-After is out of range (1090c44)
internal: stop a declaration file using a type that needs TypeScript 5.7 (e32a956)

Performance Improvements

add "sideEffects": false so bundlers can drop unused modules (f804366)
mark classes as pure so bundlers can drop unused ones (f804366)

Chores

docs: clarify that session_thread_id on tool use events is informational (a07ecf3)
docs: correct the compaction beta's parameter descriptions (eb9abd2)
internal: move the sub-packages off ts-node and modernise their tsconfig (1d7cd91)
internal: move tsconfig off settings deprecated in TypeScript 6 (e0d58f6)
internal: pin the pnpm version with an integrity hash (f804366)
internal: root package drops ts-node; repo root becomes ESM (3f371a1)
internal: stop using ts-node for the publish script and the ecosystem test runner (2e589c8)
tests: stop the mock server without failing a passing test run (a364c12)

Documentation

api: clarify usage.iterations entry typing under server-side fallback (c5f0ef3)
api: compaction instructions replace the server's summarization prompt (941aaea)
api: fix typo in temperature deprecation message (4a8b49b)
stop documenting unions with their first variant's description (fa06caf)

Open source →

0.125.010 Sept 20262 sources agree

api: add auto mode tool permissions for Managed Agents

0.125.0 (2026-09-10)

Full Changelog: sdk-v0.124.0...sdk-v0.125.0

Features

api: add auto mode tool permissions for Managed Agents (7f5e2c6)
api: add content_too_large web_fetch tool error code (f06416e)
api: add the user-profiles-2026-09-04 beta value and external_user_details to user profiles (318d42d)
api: support mounting public GitHub repositories without an authorization_token in Managed Agents sessions (9e2d945)

Chores

client: clean up the unused idempotency request option (4ce2772)
docs: correct the environment scope field description (835c677)
internal: restore package version (b43a7f6)
internal: stop stamping the package version into generated files (80ace5e)
tests: restore empty test package marker files (4f27519)

Open source →

0.124.04 Sept 20262 sources agree

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

0.124.0 (2026-09-04)

Full Changelog: sdk-v0.123.0...sdk-v0.124.0

Features

api: add Claude Tag category and user breakdowns to usage reports (669ff22)
api: add named types for organization compliance settings state (54be8da)
api: add support for sending a workspace ID on more endpoints (a11e6f1)

Bug Fixes

repair custom-code merge in messages resources (#455) (7ac43b9)
tools: create agent-toolset files and directories owner-only (#485) (a9c2298)

Chores

internal: bundle the mock server spec and update breaking-change detection (8752d02)
internal: codegen related update (a63afbc)
tests: reword the skip reason on the path-level query param tests (999bee5)

Documentation

api: update a few doc strings (2ef3d59)

Open source →

0.123.01 Sept 20262 sources agree

api: beta user profiles: add external_user_onboarded_at, remove relationship in favor of access_type

0.123.0 (2026-09-01)

Full Changelog: sdk-v0.122.0...sdk-v0.123.0

Features

api: beta user profiles: add external_user_onboarded_at, remove relationship in favor of access_type (3efb1a1)
api: manual updates (c6f0bda)
api: organization compliance settings, user-profile order_by, memory-store and toolset schema updates (8e2f0c2)

Bug Fixes

keep credential file access out of non-Node bundles (ab6a4b2)

Chores

internal: codegen related update (788ea8b)

Documentation

changelog: detail the beta files/skills GA-shape change (#1175) (4951de0)

Open source →

0.122.027 Aug 2026

api: beta files/skills namespaces use GA shapes; drop dated beta header pins

0.122.0 (2026-08-27)

Full Changelog: sdk-v0.121.0...sdk-v0.122.0

Features

api: beta files/skills namespaces use GA shapes; drop dated beta header pins (45d693a)

Bug Fixes

client: classify cross-realm DOMException abort/timeout errors correctly (1bd6395)
client: use configured logger for SSE parse errors (80eeaf7)
sessions: make event accumulator forward-compatible with new event types (#410) (2d084fd)
tools: let read return a view_range of a file over the size cap (#427) (56b3260)
uploads: default bare Blob filename on skills endpoints (#422) (e111649)
webhooks: require headers to be passed to unwrap() (3230804)

Chores

internal: codegen related update (c2f327a)

Documentation

api: clarify pagination on the organization rate-limit list endpoints (d6015b9)
document TypeScript 5.0 as the minimum supported version (788e721)

Open source →

Additional notes

Full Changelog: sdk-v0.121.0...sdk-v0.122.0

Features

api: beta files/skills namespaces use GA shapes; drop dated beta header pins (45d693a)

The beta Files and Skills namespaces (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 (with Beta-prefixed type names). Requests that still send those headers on raw HTTP keep receiving the beta shapes.

Changes in the beta namespaces:
- client.beta.skills.delete() now deletes a Skill together with all of its versions (previously refused while any version existed). It returns BetaDeletedSkill (was SkillDeleteResponse).
- Beta Messages type BetaSkill (the {type, skill_id, version} entry in BetaContainer.skills) is renamed BetaContainerSkill; the request-side BetaSkillParams keeps its name. BetaSkill now names the Skill object returned by client.beta.skills.create() / retrieve() / list() (replacing SkillCreateResponse / SkillRetrieveResponse / SkillListResponse), and skill versions are BetaSkillVersion / BetaDeletedSkillVersion (replacing Version*Response).
- client.beta.files.list() returns a BetaFileMetadataPageCursor (PageCursor<BetaFileMetadata> with data / next_page) and FileListParams paginates with page / ids (was BetaFileMetadataPage, a Page<BetaFileMetadata> with data, has_more, first_id, last_id and before_id / after_id); for await auto-pagination is unchanged. BetaSkill uses display_name (was display_title, also in SkillCreateParams) and latest_version_id (was latest_version), and BetaSkillVersion is addressed by its skver_… id (the Unix-timestamp version field is gone).
Migration guides: Migrate from files-api-2025-04-14 · Migrate from skills-2025-10-02

Bug Fixes

client: classify cross-realm DOMException abort/timeout errors correctly (1bd6395)
client: use configured logger for SSE parse errors (80eeaf7)
sessions: make event accumulator forward-compatible with new event types (#410) (2d084fd)
tools: let read return a view_range of a file over the size cap (#427) (56b3260)
uploads: default bare Blob filename on skills endpoints (#422) (e111649)
webhooks: require headers to be passed to unwrap() (3230804)

Chores

internal: codegen related update (c2f327a)

Documentation

api: clarify pagination on the organization rate-limit list endpoints (d6015b9)
document TypeScript 5.0 as the minimum supported version (788e721)

0.121.026 Aug 20262 sources agree

api: add updates thinking display mode (beta)

0.121.0 (2026-08-26)

Full Changelog: sdk-v0.120.0...sdk-v0.121.0

Features

api: add updates thinking display mode (beta) (22274ea)
api: add missing anthropic-beta values (0779f02)
api: add support for Organization API endpoints (8b61e7a)
helpers: support Standard Schema for structured outputs and tools (7880078)

Bug Fixes

tools: keep the tool runner going on pause_turn (#288) (f040dc9)
types: don't reference NodeJS.ProcessEnv from published types (#367) (fd38dfd)

Chores

docs: clarify skill version latest support and memory version retention (7405a69)
examples: remove redundant main().catch boilerplate (154ace7)
internal: cancel superseded CI runs (0532c98)
internal: codegen related update (228ff1e)
internal: minor workflow reformat (41b6c31)
internal: tighten publint and attw lint checks (e3fbd62)

Documentation

api: clarify session thread agent and usage.iterations compaction descriptions (beta) (6e852a7)
examples: use adaptive thinking in thinking examples (3dd7699)

Open source →

0.120.019 Aug 20262 sources agree

api: managed agents web search config and self hosted sandbox memory

0.120.0 (2026-08-19)

Full Changelog: sdk-v0.119.0...sdk-v0.120.0

Features

api: managed agents web search config and self hosted sandbox memory (ba8ec50)

Chores

internal: use a single pnpm workspace lockfile (#359) (3c32145)

Open source →

0.119.019 Aug 20262 sources agree

api: Files and Skills APIs are now GA; add computer use and browser use toolsets

0.119.0 (2026-08-19)

Full Changelog: sdk-v0.118.0...sdk-v0.119.0

Features

api: Files and Skills APIs are now GA; add computer use and browser use toolsets (ab41aa3)

Open source →

0.118.019 Aug 20262 sources agree

api: additions to files and memory stores

0.118.0 (2026-08-18)

Full Changelog: sdk-v0.117.1...sdk-v0.118.0

Features

api: additions to files and memory stores (fdc0379)
api: updates to skill, files, and user profiles (671e6b1)
client: add helpers for accessing the workspace ID in response headers (28aa5af)

Bug Fixes

api: remove unsupported mid_conv_system content block (ae6ca94)
session-runner: retry tool-result sends for at least the lease TTL (#339) (7dc6325)

Chores

internal: bump zod to 4.4.3 (#334) (faa5b7b)
internal: remove leftover prism references (a163b96)
stop shipping the v0.50 migration guide and migrate CLI (53992d7)

Documentation

tools: warn that blocking tool bodies stall the worker heartbeat (#299) (908fdb5)

Open source →

0.117.113 Aug 2026

ci: allow manually re-publishing a package to npm from the release workflow

Full Changelog: sdk-v0.117.0...sdk-v0.117.1

Chores

ci: allow manually re-publishing a package to npm from the release workflow (af60c1f)
internal: tag uploaded preview builds with the branch name (#295) (228f44e)

Open source →

0.116.07 Aug 2026

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

Full Changelog: sdk-v0.115.0...sdk-v0.116.0

Features

api: add mid-conversation-tool-changes-2026-07-01 beta (70e04f6)
api: add support for session budgets, advisor tool, pinned inference location and skills auto-loading from GitHub (1336a4a)
tools: make bash timeout and abort errors matchable by class (#259) (201b12e)

Bug Fixes

client: use hardcoded User-Agent strings instead of constructor names (0b97f04)

Chores

api: remove retired Claude Opus 4.1 models (11b685c)
docs: small updates to descriptions (413cc5f)
docs: updates to a few documentation strings (c38a1de)
internal/deps: bump @babel/core and @babel/helpers to 7.29.7 (#261) (3164934)
internal/deps: install tsc-multi from the npm registry (#265) (c787f90)
internal: codegen related update (73b3d61)

Open source →

0.115.024 Jul 2026

api: add tool addition/removal blocks and tool_change events

Full Changelog: sdk-v0.114.0...sdk-v0.115.0

Features

api: add claude-opus-5 model (cdd3606)
api: add tool addition/removal blocks and tool_change events (cdd3606)
api: expand client-side fallback credit token types and add server-side fallbacks default option (cdd3606)

Bug Fixes

client: release abort listeners when requests settle (#1129) (b85e902)

Open source →

0.114.023 Jul 2026

api: add new stop reason 'model_context_window_exceeded'

Full Changelog: sdk-v0.113.0...sdk-v0.114.0

Features

api: add new stop reason 'model_context_window_exceeded' (1ec71c1)

Open source →

0.113.022 Jul 2026

api: add support for Managed Agents model effort, initial session events, and threads delta streaming

Full Changelog: sdk-v0.112.5...sdk-v0.113.0

Features

api: add support for Managed Agents model effort, initial session events, and threads delta streaming (83fef1e)

Open source →

0.112.521 Jul 2026

api: add support for new refusal category

Full Changelog: sdk-v0.112.4...sdk-v0.112.5

Chores

api: add support for new refusal category (479efe8)
internal: codegen related update (830fb74)

Open source →

0.112.420 Jul 2026

aws: preserve AWS options and auth mode across withOptions()

Full Changelog: sdk-v0.112.3...sdk-v0.112.4

Bug Fixes

aws: preserve AWS options and auth mode across withOptions() (#214) (3f7665c)

Chores

docs: small updates (97f68a8)

Open source →

0.112.317 Jul 2026

Full Changelog: sdk-v0.112.2...sdk-v0.112.3 ### Chores * docs: small updates

Full Changelog: sdk-v0.112.2...sdk-v0.112.3

Chores

docs: small updates (79fd6c7)

Open source →

0.112.217 Jul 2026

Full Changelog: sdk-v0.112.1...sdk-v0.112.2 ### Chores * client: docs updates

Full Changelog: sdk-v0.112.1...sdk-v0.112.2

Chores

client: docs updates (fdb3a65)

Open source →

0.112.116 Jul 2026

Full Changelog: sdk-v0.112.0...sdk-v0.112.1

Open source →

0.112.016 Jul 2026

api: add support for MCP Tunnels

Full Changelog: sdk-v0.111.0...sdk-v0.112.0

Features

api: add support for MCP Tunnels (597ac41)

Open source →

0.111.010 Jul 2026

tools: gate session tool calls on evaluated_permission; bound idle by server stop_reason

Full Changelog: sdk-v0.110.0...sdk-v0.111.0

Features

api: add support for dreaming (77b28a6)
tools: gate session tool calls on evaluated_permission; bound idle by server stop_reason (68a6d7b)

Chores

docs: small updates to field descriptions (e25b885)
docs: update model example (a33f3f0)
docs: updates to descriptions and examples (eac4bac)

Open source →

0.110.02 Jul 2026

api: add agent-memory-2026-07-22 beta header

Full Changelog: sdk-v0.109.1...sdk-v0.110.0

Features

api: add agent-memory-2026-07-22 beta header (a470e10)

Open source →

0.109.11 Jul 2026

api: remove some nonfunctional types from the SDKs

Full Changelog: sdk-v0.109.0...sdk-v0.109.1

Chores

api: remove some nonfunctional types from the SDKs (cc4dd4e)

Open source →

0.109.030 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: sdk-v0.108.0...sdk-v0.109.0

Features

api: add support for Managed Agents event delta streaming, agent overrides, reverse pagination, vault credential injection scoping, and agent and deployment webhook events (7f3211b)

Open source →

0.108.030 Jun 2026

api: add support for claude-sonnet-5

Full Changelog: sdk-v0.107.0...sdk-v0.108.0

Features

api: add support for claude-sonnet-5 (4588db0)

Bug Fixes

agent-toolset: allow absolute paths that resolve inside workdir (#112) (e951fb2)

Chores

format README.md (#176) (98dcff7)

Open source →

0.107.029 Jun 2026

api: add support for 20260318 web fetch and support tools

Full Changelog: sdk-v0.106.0...sdk-v0.107.0

Features

api: add support for 20260318 web fetch and support tools (d7057ea)

Bug Fixes

agent-toolset: bound canonicalize symlink hops; resolve glob matches before confinement check (#142) (277be80)
types: restore BatchCreateParams.Request.params dropped by codegen merge (#165) (c6b68d2)

Chores

api: accept user profile ID's when counting tokens (6cda67e)
docs: updates to descriptions and example values (51a5f81)

Documentation

update readme requirements to match anthropic docs (#146) (3818412)

Open source →

0.106.024 Jun 2026

client: add support for system.message streaming events

Full Changelog: sdk-v0.105.0...sdk-v0.106.0

Features

client: add support for system.message streaming events (a7c14b7)

Bug Fixes

helpers: single source for x-stainless-helper, append semantics, and tag the fallback middleware (#107) (106bea0)

Chores

api: add support for new refusal category (b38fd01)
api: add support for sending User Profile ID in request headers (198583e)

Open source →

0.105.018 Jun 2026Deprecated

tests: stop using deprecated models

Full Changelog: sdk-v0.104.2...sdk-v0.105.0

Features

api: add support for new code_execution_20260120 tool (8dc2b54)
stream: lazily parse partial tool json input (#99) (e55ceee)

Chores

internal/deps: bump swc to 1.15.40 (#97) (a1d4d75)
internal: use are the types wrong directly (#94) (3d362af)
tests: stop using deprecated models (#98) (65ae1af)

Open source →

0.104.215 Jun 2026

api: remove retired models from API and SDKs

Full Changelog: sdk-v0.104.1...sdk-v0.104.2

Chores

api: remove retired models from API and SDKs (a942876)

Open source →

0.104.19 Jun 2026

api: add frontier_llm refusal category

Full Changelog: sdk-v0.104.0...sdk-v0.104.1

Bug Fixes

api: add frontier_llm refusal category (465e686)

Open source →

0.104.09 Jun 2026

api: add support for Managed Agents deployments and environment variable credentials

Full Changelog: sdk-v0.103.0...sdk-v0.104.0

Features

api: add support for Managed Agents deployments and environment variable credentials (d01e38b)

Open source →

0.103.09 Jun 2026

api: add support for claude-mythos-5 and claude-fable-5, with support for server-side fallbacks on refusal

Full Changelog: sdk-v0.102.0...sdk-v0.103.0

Features

api: add support for claude-mythos-5 and claude-fable-5, with support for server-side fallbacks on refusal (cc337f7)
client: adds client-side fallbacks middleware for API providers that do not support server-side fallbacks (cc337f7)
middleware: add ctx.logger (#55) (edd1454)

Bug Fixes

client: 3p middleware ordering (#53) (2a4c339)

Open source →

0.102.06 Jun 2026

api: small updates to Managed Agents types

Full Changelog: sdk-v0.101.0...sdk-v0.102.0

Features

api: small updates to Managed Agents types (8ba4f92)

Bug Fixes

client: run middleware before request signing (#45) (95f1a4a)

Open source →

0.101.05 Jun 2026

client: add support for middleware

Full Changelog: sdk-v0.100.1...sdk-v0.101.0

Features

client: add support for middleware (9b01120)

Bug Fixes

apply request timeout to inner fetch only, not middleware chain (#40) (25c13f6)
streaming: carry stop_details through beta message_delta accumulation (ed3fec7)
streaming: correctly parse json numbers with scientific notation (#9) (7d5e642)

Chores

internal: fix artifact url (925ec27)
internal: fix branch names (fa3cf2c)
internal: update private repo name (a8ac213)

Documentation

point security reports to Anthropic's HackerOne program (#16) (5c7912c)

Open source →

0.100.129 May 2026

streaming: carry encrypted_content on beta compaction blocks

Full Changelog: sdk-v0.100.0...sdk-v0.100.1

Bug Fixes

streaming: carry encrypted_content on beta compaction blocks (#1025) (eccddf3)

Chores

client: update lockfiles to have proper dependencies on standardwebhooks (5e9b523)

Open source →

0.100.028 May 2026

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

Full Changelog: sdk-v0.99.0...sdk-v0.100.0

Features

api: Add support for claude-opus-4-8, mid-conversation system blocks, and usage.output_tokens_details (bb0bf27)

Documentation

replace literal newlines (66ba142)

Open source →

0.99.027 May 2026

streaming: carry stop_details through message_delta accumulation

Full Changelog: sdk-v0.98.1...sdk-v0.99.0

Features

support custom file size caps (#1029) (814cd4c)

Bug Fixes

streaming: carry stop_details through message_delta accumulation (#1027) (198bc27)

Open source →

0.98.126 May 2026

client: preserve directory prefix in skills.versions.create uploads

Full Changelog: sdk-v0.98.0...sdk-v0.98.1

Bug Fixes

client: preserve directory prefix in skills.versions.create uploads (#1024) (abbcd6a)

Chores

client: swap to using Trusted Publishing (821a50e)
examples: rename managed-agents private-sandbox-worker example to self-hosted-sandbox-worker (#1023) (49fe221)

Open source →

0.98.021 May 2026

api: Add support for thinking-token-count beta for estimated tokens in thinking block deltas when streaming

Full Changelog: sdk-v0.97.1...sdk-v0.98.0

Features

api: Add support for thinking-token-count beta for estimated tokens in thinking block deltas when streaming (0528d47)

Open source →

0.97.119 May 2026

runner: skip tool calls SessionToolRunner does not own

Full Changelog: sdk-v0.97.0...sdk-v0.97.1

Bug Fixes

runner: skip tool calls SessionToolRunner does not own (9987379)

Open source →

0.97.019 May 2026

client: Add support for self-hosted sandboxes in CMA with sandbox helpers

Full Changelog: sdk-v0.96.0...sdk-v0.97.0

Features

client: Add support for self-hosted sandboxes in CMA with sandbox helpers (659a343)

Bug Fixes

typescript: upgrade tsc-multi so that it works with Node 26 (623f71c)

Chores

tests: remove redundant File import (cf821fc)

Open source →

0.96.013 May 2026

api: Add BetaManagedAgentsSearchResultBlock types

Full Changelog: sdk-v0.95.2...sdk-v0.96.0

Features

api: Add BetaManagedAgentsSearchResultBlock types (08f02f3)
api: Add support for cache diagnostics beta (eafbd6d)

Bug Fixes

zod: ensure only zod/v4 types are used (#992) (9e08bcc)

Chores

api: spec updates (27d64ef)

Open source →

0.95.211 May 2026

Full Changelog: sdk-v0.95.1...sdk-v0.95.2

Open source →

0.95.17 May 2026

redact api-key headers in debug logs

Full Changelog: sdk-v0.95.0...sdk-v0.95.1

Chores

redact api-key headers in debug logs (fad8fee)

Open source →

0.95.06 May 2026

api: add support for Managed Agents multiagents and outcomes, webhooks, vault validation

Full Changelog: sdk-v0.94.0...sdk-v0.95.0

Features

api: add support for Managed Agents multiagents and outcomes, webhooks, vault validation (e0c0e9b)

Bug Fixes

api: Adjust webhook configuration (deed3f6)

Open source →

0.94.05 May 2026

client: allow targeting a workspace for OIDC federation token exchange

Full Changelog: sdk-v0.93.0...sdk-v0.94.0

Features

client: allow targeting a workspace for OIDC federation token exchange (bde6620)

Open source →

0.93.04 May 2026

client: add Workload Identity Federation, interactive OAuth, and auth profiles

Full Changelog: sdk-v0.92.0...sdk-v0.93.0

Features

client: add Workload Identity Federation, interactive OAuth, and auth profiles (d5d6abd)

Open source →

0.92.030 Apr 2026

api: improve Managed Agents APIs

Full Changelog: sdk-v0.91.1...sdk-v0.92.0

Features

api: improve Managed Agents APIs (ca1bf4a)
support setting headers via env (32f67d4)

Bug Fixes

bedrock: throw APIError for error events delivered in chunk frames (#1021) (3ae887b)

Chores

format: run eslint and prettier separately (7ce257c)
internal: codegen related update (f08cc77)

Open source →

0.91.124 Apr 2026

memory: use restrictive file mode for memory files

Full Changelog: sdk-v0.91.0...sdk-v0.91.1

Bug Fixes

memory: use restrictive file mode for memory files (#901) (6db3b7e)

Chores

formatter: run prettier and eslint separately (974d22f)

Open source →

0.91.023 Apr 2026

bedrock: use auth header for mantle client

Full Changelog: sdk-v0.90.0...sdk-v0.91.0

Features

api: CMA Memory public beta (ddf732f)
bedrock: use auth header for mantle client (#866) (aec801a)

Bug Fixes

api: fix errors in api spec (ae10768)
api: restore missing features (1a5b47b)

Chores

internal: more robust bootstrap script (7716e19)
tests: bump steady to v0.22.1 (219a971)

Open source →

0.90.016 Apr 2026

api: add claude-opus-4-7, token budgets and user_profiles

Full Changelog: sdk-v0.89.0...sdk-v0.90.0

Features

api: add claude-opus-4-7, token budgets and user_profiles (b26134b)

Chores

actually delete release-doctor.yml (0fe984d)
ci: remove release-doctor workflow (08e58bd)

Open source →

0.89.014 Apr 2026Deprecated

api: mark Sonnet and Opus 4 as deprecated

Full Changelog: sdk-v0.88.0...sdk-v0.89.0

Features

api: manual updates (57c2a11)
api: mark Sonnet and Opus 4 as deprecated (eff41b7)

Bug Fixes

streaming: add missing events (4c52919)

Open source →

0.88.010 Apr 2026

Full Changelog: sdk-v0.87.0...sdk-v0.88.0 ### Features * vertex eu region (#882) (1933857) ### Documentation * improve examples (de4f483) * update exa

Full Changelog: sdk-v0.87.0...sdk-v0.88.0

Features

vertex eu region (#882) (1933857)

Documentation

improve examples (de4f483)
update examples (454e1c5)

Open source →

0.87.09 Apr 2026

Full Changelog: sdk-v0.86.1...sdk-v0.87.0 ### Features * api: Add beta advisor tool

Full Changelog: sdk-v0.86.1...sdk-v0.87.0

Features

api: Add beta advisor tool (1e99a8d)

Open source →

0.86.18 Apr 2026

update @anthropic-ai/sdk dependency version

Full Changelog: sdk-v0.86.0...sdk-v0.86.1

Chores

update @anthropic-ai/sdk dependency version (#870) (036342b)

Open source →

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@anthropic-ai/sdk

Release timeline

Releases

0.131.0 (2026-09-30)

Features

Chores

0.130.0 (2026-09-30)

Features

Bug Fixes

Chores

0.129.0 (2026-09-28)

Features

Bug Fixes

Performance Improvements

Chores

Documentation

0.128.0 (2026-09-22)

Features

Bug Fixes

Chores

0.127.0 (2026-09-18)

Features

Bug Fixes

Performance Improvements

Chores

0.126.0 (2026-09-15)

Features

Bug Fixes

Performance Improvements

Chores

Documentation

0.125.0 (2026-09-10)

Features

Chores

0.124.0 (2026-09-04)

Features

Bug Fixes

Chores

Documentation

0.123.0 (2026-09-01)

Features

Bug Fixes

Chores

Documentation

0.122.0 (2026-08-27)

Features

Bug Fixes

Chores

Documentation

Features

Bug Fixes

Chores

Documentation

0.121.0 (2026-08-26)

Features

Bug Fixes

Chores

Documentation

0.120.0 (2026-08-19)

Features

Chores

0.119.0 (2026-08-19)

Features

0.118.0 (2026-08-18)

Features

Bug Fixes

Chores

Documentation

Chores

Features

Bug Fixes

Chores

Features

Bug Fixes

Features

Features

Chores

Bug Fixes

Chores

Chores