anthropic

0.86.0 (2026-03-18)

Full Changelog: v0.85.0...v0.86.0

Features

• add support for filesystem memory tools (#1247) (235d218)
• api: manual updates (86dbe4a)
• api: manual updates (45d9cc0)

Bug Fixes

• AsyncAnthropic._make_status_error missing 529 and 413 cases (#1244) (05220bc)
• deps: bump minimum typing-extensions version (09ab112)
• pydantic: do not pass by_alias unless set (b17480e)

Chores

• internal: tweak CI branches (3c0308c)

0.85.0 (2026-03-16)

Full Changelog: v0.84.0...v0.85.0

Features

• api: chore(config): clean up model enum list (#31) (cce1a5b)
• api: GA thinking-display-setting (207340c)
• tests: update mock server (7dc86a4)

Bug Fixes

• client: add missing 413 and 529 error handlers to async client (#1554) (9c2986f)
• tool runner: propagate container_id for programmatic tool calling (#1462) (3ae7ff6)
• tools: use filtered messages list in async compaction (#1124) (710d666)

Chores

• ci: bump uv version (09656ac)
• internal: codegen related update (c9e9fc2)
• internal: codegen related update (77f77d1)
• tests: unskip tests that are now supported in steady (827330b)

0.84.0 (2026-02-25)

Full Changelog: v0.83.0...v0.84.0

Features

• api: change array_format to brackets (925d2ad)
• api: remove publishing section from cli target (7bc7ceb)
• helpers: add conversion helpers for MCP tools, prompts, and resources (#1383) (9489751)

Chores

• add missing raw jsonl results method (1009d4a)
• internal: add request options to SSE classes (4f4bc8e)
• internal: make test_proxy_environment_variables more resilient (f7056e0)
• internal: make test_proxy_environment_variables more resilient to env (143efcc)
• internal: simplify http snapshots (#1092) (4a4dc9f)
• internal: update jsonl tests (a8e6a6e)

Documentation

• rebrand to Claude SDK and streamline README (6b54405)

0.83.0 (2026-02-19)

Full Changelog: v0.82.0...v0.83.0

Features

• api: Add top-level cache control (automatic caching) (a940123)

Chores

• update mock server docs (34ef48c)

0.82.0 (2026-02-18)

Full Changelog: v0.81.0...v0.82.0

Features

• api: fix shared UserLocation and error code types (da3b931)

Bug Fixes

• add backward-compat aliases for removed nested UserLocation classes (#1409) (56db1e3)

0.81.0 (2026-02-18)

Full Changelog: v0.80.0...v0.81.0

Features

• api: Make new tool versions available as top level tool types (0a385c2)

0.80.0 (2026-02-17)

Full Changelog: v0.79.0...v0.80.0

Features

• api: Releasing claude-sonnet-4-6 (d518d6e)

Bug Fixes

• api: fix spec errors (1413a76)
• remove speed from ga messages (#1402) (f6ce67c)

Chores

• format all api.md files (28a0eb5)
• internal: bump dependencies (99f3014)
• internal: fix lint error on Python 3.14 (a90d71b)

Refactors

• vertex: remove redundant isinstance check in load_auth (#1387) (6b7a7dc)

0.79.0 (2026-02-07)

Full Changelog: v0.78.0...v0.79.0

Features

• api: enabling fast-mode in claude-opus-4-6 (5953ba7)

Bug Fixes

• pass speed parameter through in sync beta count_tokens (1dd6119)

0.78.0 (2026-02-05)

Full Changelog: v0.77.1...v0.78.0

Features

• api: Release Claude Opus 4.6, adaptive thinking, and other features (3ef1529)

0.77.1 (2026-02-03)

Full Changelog: v0.77.0...v0.77.1

Bug Fixes

• structured outputs: send structured output beta header when format is omitted (#1158) (258494e)

Chores

• remove claude-code-review workflow (#1338) (aec4512)

0.77.0 (2026-01-29)

Full Changelog: v0.76.0...v0.77.0

Features

• api: add support for Structured Outputs in the Messages API (ad56677)
• api: migrate sending message format in output_config rather than output_format (af405e4)
• client: add custom JSON encoder for extended type support (7780e90)
• use output_config for structured outputs (82d669d)

Bug Fixes

• client: run formatter (2e4ff86)
• remove class causing breaking change (#1333) (81ee953)
• structured outputs: avoid including beta header if output_format is missing (#1121) (062077e)

Chores

• ci: upgrade actions/github-script (34df616)
• internal: update actions/checkout version (ea50de9)

0.76.0 (2026-01-13)

Full Changelog: v0.75.0...v0.76.0

Features

• allow raw JSON schema to be passed to messages.stream() (955c61d)
• client: add support for binary request streaming (5302f27)
• tool runner: add support for server-side tools (#1086) (1521316)

Bug Fixes

• client: loosen auth header validation (5a0b89b)
• ensure streams are always closed (388bd0c)
• types: allow pyright to infer TypedDict types within SequenceNotStr (ede3242)
• use async_to_httpx_files in patch method (718fa8e)

Chores

• add missing docstrings (d306605)
• bump required uv version (90634f3)
• ci: Add Claude Code GitHub Workflow (#1293) (83d1c4a)
• deps: mypy 1.18.1 has a regression, pin to 1.17 (21c6374)
• docs: use environment variables for authentication in code snippets (87aa378)
• fix docstring (51fca79)
• internal: add --fix argument to lint script (8914b7a)
• internal: add missing files argument to base client (6285abc)
• internal: avoid using unstable Python versions in tests (4547171)
• update lockfile (d7ae1fc)
• update uv.lock (746ac05)

0.75.0 (2025-11-24)

Full Changelog: v0.74.1...v0.75.0

Features

• api: adds support for Claude Opus 4.5, Effort, Advance Tool Use Features, Autocompaction, and Computer Use v5 (5c3e633)

Bug Fixes

• internal: small fixes (36c82f7)

Chores

• fix lint issues (4f1fd54)

0.74.1 (2025-11-19)

Full Changelog: v0.74.0...v0.74.1

Bug Fixes

• structured outputs: use correct beta header (e90d347)

Chores

• examples: update model references (e09461d)

0.74.0 (2025-11-18)

Full Changelog: v0.73.0...v0.74.0

Features

• add Foundry SDK (3ae9e45)

Bug Fixes

• examples/memory: properly add assistant_content to messages (#1049) (9c7141b)
• use posix paths in file collection for cross-platform compatibility (d9c6f40), closes #1051

Chores

• internal: remove unnecessary wrapper around external snapshots (19eceac)

Documentation

• explain snapshot update process (#1040) (b61fd87)

0.73.0 (2025-11-14)

Full Changelog: v0.72.1...v0.73.0

Features

• api: add support for structured outputs beta (688da81)

0.72.1 (2025-11-11)

Full Changelog: v0.72.0...v0.72.1

Bug Fixes

• client: close streams without requiring full consumption (109b771)
• compat with Python 3.14 (bd2a137)
• compat: update signatures of model_dump and model_dump_json for Pydantic v1 (540f0f8)

Chores

• internal/tests: avoid race condition with implicit client cleanup (72767ce)
• internal: grammar fix (it's -> its) (9efe993)
• package: drop Python 3.8 support (e9af5d3)

0.72.0 (2025-10-28)

Full Changelog: v0.71.1...v0.72.0

Features

• api: add ability to clear thinking in context management (27c8f17)

0.71.1 (2025-10-28)

Full Changelog: v0.71.0...v0.71.1

Bug Fixes

• client: resolve non-functional default socket options (4606137)

Chores

• api: mark older sonnet models as deprecated (7906595)
• bump httpx-aiohttp version to 0.1.9 (5d27492)

0.71.0 (2025-10-16)

Full Changelog: v0.70.0...v0.71.0

Features

• api: adding support for agent skills (51a606f)

0.70.0 (2025-10-15)

Full Changelog: v0.69.0...v0.70.0

Features

• api: manual updates (39e62ac)

Chores

• client: add context-management-2025-06-27 beta header (36dd334)
• client: add model-context-window-exceeded-2025-08-26 beta header (2cbdb0f)
• internal: detect missing future annotations with ruff (b2a2b05)

0.69.0 (2025-09-29)

Full Changelog: v0.68.2...v0.69.0

Features

• api: adds support for Claude Sonnet 4.5 and context management features (f93eb12)

0.68.2 (2025-09-29)

Full Changelog: v0.68.1...v0.68.2

Bug Fixes

• do not set headers with default to omit (95b14ab)

0.68.1 (2025-09-26)

Full Changelog: v0.68.0...v0.68.1

Chores

• deps: move deprecated dev-dependencies in pyproject.toml to dev group (df16b88)
• do not install brew dependencies in ./scripts/bootstrap by default (a457673)
• rename tool runner helper header (a9ed3f9)
• types: change optional parameter type from NotGiven to Omit (9f0a11f)
• update more NotGiven usage sites (72ab661)

0.68.0 (2025-09-17)

Full Changelog: v0.67.0...v0.68.0

Features

• add tool running helpers (d9c9ce6)

Chores

• internal: fix tests (9858c79)
• internal: update pydantic dependency (f59c2f1)
• tests: simplify get_platform test (7596748)

0.67.0 (2025-09-10)

Full Changelog: v0.66.0...v0.67.0

Features

• api: adds support for web_fetch_20250910 tool (f85b6a1)
• improve future compat with pydantic v3 (39f28c5)

Bug Fixes

• more updates for future pydantic v3 compat (7967d15)
• types/beta: add response content block type to params (#1030) (9febe38)

Chores

• internal: move mypy configurations to pyproject.toml file (c5347b6)
• update SDK settings (36e6870)

0.66.0 (2025-09-03)

Full Changelog: v0.65.0...v0.66.0

Features

• api: adds support for Documents in tool results (5309dad)

0.65.0 (2025-09-02)

Full Changelog: v0.64.0...v0.65.0

Features

• client: adds support for code-execution-2025-08-26 tool (fe92af0)
• types: replace List[str] with SequenceNotStr in params (f542b54)

Bug Fixes

• avoid newer type syntax (c6d1cf5)
• client: remove unused import (712c6d8)

Chores

• client: sync SequenceNotStr over to custom stream methods (dd16483)
• internal: add Sequence related utils (d523f29)
• internal: bump uv version (aab5bc6)
• internal: change ci workflow machines (5383431)
• internal: codegen related update (eb8b19f)
• internal: improve breaking change detection (6c8afa9)
• internal: refactor pydantic v1 test setup (cb5444b)
• internal: run tests in an isolated environment (9adb089)
• internal: update pyright exclude list (85961ef)
• update github action (1e6a135)

0.64.0 (2025-08-13)

Full Changelog: v0.63.0...v0.64.0

Features

• api: makes 1 hour TTL Cache Control generally available (35201ba)

Chores

• deprecate older claude-3-5 sonnet models (#1116) (3e8e10d)

0.63.0 (2025-08-12)

Full Changelog: v0.62.0...v0.63.0

Features

• betas: add context-1m-2025-08-07 (57a80e7)

Chores

• internal: detect breaking changes when removing endpoints (5c62d7b)
• internal: update comment in script (9e9d69c)
• internal: update test skipping reason (b18a3d5)
• update @stainless-api/prism-cli to v5.15.0 (55cb0a1)

0.62.0 (2025-08-08)

Full Changelog: v0.61.0...v0.62.0

Features

• api: search result content blocks (1ae15cd)

0.61.0 (2025-08-05)

Full Changelog: v0.60.0...v0.61.0

Features

• api: add claude-opus-4-1-20250805 (baae0ee)
• api: adds support for text_editor_20250728 tool (9ad8fe5)
• client: support file upload requests (a9bd98a)

Chores

• client: add TextEditor_20250429 tool (ec207c5)
• internal: codegen related update (4498057)
• internal: fix ruff target version (3cfa202)

0.60.0 (2025-07-28)

Full Changelog: v0.59.0...v0.60.0

Features

• update streaming error message to say 'required' not 'recommended' (57120c8)
• update streaming error message to say 'required' not 'recommended' (3b47368)

Bug Fixes

• vertex: add missing beta methods (#1004) (f8e9cb4)

Chores

• project: add settings file for vscode (1c4a9b1)

0.59.0 (2025-07-23)

Full Changelog: v0.58.2...v0.59.0

Features

• api: removed older deprecated models (38998fd)

Bug Fixes

• parsing: ignore empty metadata (7099f32)
• parsing: parse extra field types (dbea8a4)

Chores

• internal: version bump (5defffa)

0.58.2 (2025-07-18)

Full Changelog: v0.58.1...v0.58.2

Chores

• internal: version bump (cd5d1ad)

0.58.1 (2025-07-18)

Full Changelog: v0.58.0...v0.58.1

Chores

• internal: version bump (31c3b38)

0.58.0 (2025-07-18)

Full Changelog: v0.57.1...v0.58.0

Features

• clean up environment call outs (4f64e9c)

Bug Fixes

• client: don't send Content-Type header on GET requests (727268f)
• parsing: correctly handle nested discriminated unions (44dd47e)

Chores

• internal: bump pinned h11 dep (9a947e1)
• internal: codegen related update (33f2b34)
• internal: version bump (5f0f5ad)
• package: mark python 3.13 as supported (703d557)
• readme: fix version rendering on pypi (dd956a6)

Documentation

• model in examples (89b6925)
• model in examples (1eccecb)

0.57.1 (2025-07-03)

Full Changelog: v0.57.0...v0.57.1

Chores

• api: update BetaCitationSearchResultLocation (e0735b4)
• internal: version bump (d368831)

0.57.0 (2025-07-03)

Full Changelog: v0.56.0...v0.57.0

Features

• api: add support for Search Result Content Blocks (4896178)

Bug Fixes

• improve timeout/network error message to be more helpful (347fb57)

Chores

• ci: change upload type (4dc4178)
• internal: version bump (363629c)
• stream: improve get_final_text() error message (#979) (5ae0a33)

Documentation

• fix vertex id (f7392c7)
• fix vertex id (92fe132)
• update model in readme (1a4df78)
• update models and non-beta (a54e65c)
• update more models (9e3dd6a)

0.56.0 (2025-07-01)

Full Changelog: v0.55.0...v0.56.0

Features

• bedrock: automatically infer AWS Region (#974) (f648e09)
• vertex: support global region endpoint (1fd1adf)

Bug Fixes

• ci: correct conditional (18e625a)
• ci: release-doctor — report correct token name (c91f50d)
• tests: avoid deprecation warnings (71b432f)

Chores

• ci: only run for pushes and fork pull requests (447b793)
• internal: add breaking change detection (e6d0eca)
• internal: codegen related update (f88517b)
• internal: codegen related update (a385cb9)
• internal: codegen related update (9d4b537)
• internal: codegen related update (6a3a6fe)
• internal: codegen related update (28704a6)
• tests: run tests with min and max supported Python versions by default (0ad8534)
• tests: skip some failing tests on the latest python versions (f63a2d2)

0.55.0 (2025-06-23)

Full Changelog: v0.54.0...v0.55.0

Features

• api: api update (4b2134e)
• api: api update (2093bff)
• api: manual updates (c80fda8)
• client: add support for aiohttp (3b03295)

Bug Fixes

• client: correctly parse binary response | stream (d93817d)
• internal: revert unintentional changes (bb3beab)
• tests: fix: tests which call HTTP endpoints directly with the example parameters (ee69d74)
• tests: suppress warnings in tests when running on the latest Python versions (#982) (740da21)

Chores

• ci: enable for pull requests (08f2dd2)
• internal: update conftest.py (1174a62)
• internal: version bump (7241eaa)
• readme: update badges (00661c2)
• tests: add tests for httpx client instantiation & proxies (b831d88)
• tests: run tests in parallel (4b24a79)

Documentation

• client: fix httpx.Timeout documentation reference (b0138b1)

0.54.0 (2025-06-10)

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

Features

• client: add support for fine-grained-tool-streaming-2025-05-14 (07ec081)

Bug Fixes

• httpx: resolve conflict between default transport and proxy settings (#969) (a6efded)
• tests: update test (99c2433)

Chores

• internal: version bump (45029f4)

Documentation

• contributing: fix uv script for bootstrapping (d2bde52)

0.53.0 (2025-06-09)

Full Changelog: v0.52.2...v0.53.0

Features

• client: add follow_redirects request option (e5238c0)
• client: add support for new text_editor_20250429 tool (b3b3f5b)

Bug Fixes

• client: deprecate BetaBase64PDFBlock in favor of BetaRequestDocumentBlock (5ac58e9)
• internal: fix typing remapping (6c415da)

Chores

• internal: codegen related update (94812ec)
• internal: version bump (41ce701)
• tests: improve testing by extracting fixtures (68c62cc)

0.52.2 (2025-06-02)

Full Changelog: v0.52.1...v0.52.2

Bug Fixes

• client: fix issue with server_tool_use input tracking and improve tests (3fe3fa2)
• docs: remove reference to rye shell (2b3d677)

Chores

• docs: remove unnecessary param examples (6b129f4)

Refactors

• pkg: switch from rye to uv (f553908)

0.52.1 (2025-05-28)

Full Changelog: v0.52.0...v0.52.1

Bug Fixes

• example: logo.png was broken (#1021) (1ee8314)

Chores

• examples: show how to pass an authorization token to an MCP server (18be7f3)
• internal: fix release workflows (be9af1f)

0.52.0 (2025-05-22)

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

Features

• api: add claude 4 models, files API, code execution tool, MCP connector and more (9c48bc6)

Bug Fixes

• package: support direct resource imports (6d73bab)

Chores

• ci: fix installation instructions (ca374e5)
• ci: upload sdks to package manager (fde0c44)
• internal: avoid errors for isinstance checks on proxies (ef4be3f)
• internal: codegen related update (40359d9)

Documentation

• add security warning for overriding parameters (#1008) (9f52239)

0.51.0 (2025-05-07)

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

Features

• api: adds web search capabilities to the Claude API (bec0cf9)

Bug Fixes

• pydantic v1: more robust ModelField.annotation check (c50f406)
• sockets: handle non-portable socket flags (#935) (205c8dd)

Chores

• broadly detect json family of content-type headers (66bbb3a)
• ci: only use depot for staging repos (c867a11)
• ci: run on more branches and use depot runners (95f5f17)
• internal: add back missing custom modifications for Web Search (f43ba69)
• internal: minor formatting changes (8afef08)
• use lazy imports for resources (704be81)

0.50.0 (2025-04-22)

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

Features

• api: extract ContentBlockDelta events into their own schemas (#920) (ae773d6)
• api: manual updates (46ac1f8)
• api: manual updates (48d9739)
• api: manual updates (66e8cc3)
• api: manual updates (a74746e)

Bug Fixes

• ci: ensure pip is always available (#907) (3632687)
• ci: remove publishing patch (#908) (cae0323)
• client: deduplicate stop reason type (#913) (3ab0194)
• client: send all configured auth headers (#929) (9d2581e)
• perf: optimize some hot paths (cff76cb)
• perf: skip traversing types for NotGiven values (dadac7f)
• project: bump httpx minimum version to 0.25.0 (b554138), closes #902
• types: handle more discriminated union shapes (#906) (2fc179a)
• vertex: explicitly include requests extra (2b1221b)

Chores

• add hash of OpenAPI spec/config inputs to .stats.yml (#912) (ddf7835)
• ci: add timeout thresholds for CI jobs (7226a5c)
• client: minor internal fixes (99b9a38)
• internal: add back release workflow (ce18972)
• internal: base client updates (2e08c71)
• internal: bump pyright version (d9ea30e)
• internal: bump rye to 0.44.0 (#905) (e1a1b14)
• internal: expand CI branch coverage (#934) (b23fdc9)
• internal: fix list file params (cfbaaf9)
• internal: import ordering changes (#895) (b8da2f7)
• internal: import reformatting (5e6cd74)
• internal: reduce CI branch coverage (07e813f)
• internal: refactor retries to not use recursion (4354e82)
• internal: remove CI condition (#916) (043b56b)
• internal: remove extra empty newlines (#904) (cfe8f6e)
• internal: remove trailing character (#924) (dc8e781)
• internal: remove unused http client options forwarding (#890) (e0428bf)
• internal: slight transform perf improvement (#931) (3ed4e5e)
• internal: update config (#914) (a697234)
• internal: update models test (b1e031d)
• internal: update pyright settings (38bdc6c)
• internal: variable name and test updates (#925) (f5d0809)
• tests: improve enum examples (#932) (808aaf3)
• vertex: improve error message when missing extra (15dc4cb)

Documentation

• revise readme docs about nested params (#900) (0f80ab0)
• swap examples used in readme (#928) (96ff1c7)

0.49.0 (2025-02-28)

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

Features

• api: add support for disabling tool calls (#888) (bfde3d2)

Chores

• docs: update client docstring (#887) (4d3ec5e)

Documentation

• update URLs from stainlessapi.com to stainless.com (#885) (312364b)

0.48.0 (2025-02-27)

Full Changelog: v0.47.2...v0.48.0

Features

• api: add URL source blocks for images and PDFs (#884) (e6b3a70)

Documentation

• add thinking examples (f463248)

0.47.2 (2025-02-25)

Full Changelog: v0.47.1...v0.47.2

Bug Fixes

• beta: add thinking to beta.messages.stream (69e3db1)

Chores

• internal: properly set pydantic_private (#879) (3537a3b)

0.47.1 (2025-02-24)

Full Changelog: v0.47.0...v0.47.1

Chores

• internal: update spec (#871) (916be18)
• update large max_tokens error message (40c71df)

0.47.0 (2025-02-24)

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

Features

• api: add claude-3.7 + support for thinking (c5387e6)
• client: add more status exceptions (#854) (00d9512)
• client: allow passing NotGiven for body (#868) (8ab445e)

Bug Fixes

• client: mark some request bodies as optional (8ab445e)

Chores

• internal: fix devcontainers setup (#870) (1a21c6a)

0.46.0 (2025-02-18)

Full Changelog: v0.45.2...v0.46.0

Features

• client: send X-Stainless-Read-Timeout header (#858) (0e75983)
• jsonl: add .close() method (#862) (137335c)
• pagination: avoid fetching when has_more: false (#860) (0cdb81d)

Bug Fixes

• asyncify on non-asyncio runtimes (#864) (f92b36d)
• internal: add back custom header naming support (#861) (cf851ae)
• jsonl: lower chunk size (#863) (38fb720)

Chores

• api: update openapi spec url (#852) (461d821)
• internal: bummp ruff dependency (#856) (590c3fa)
• internal: change default timeout to an int (#855) (3152e1a)
• internal: fix tests (fc41ba2)
• internal: fix type traversing dictionary params (#859) (c5b700d)
• internal: reorder model constants (#847) (aadd531)
• internal: update models used in tests (aadd531)

0.45.2 (2025-01-27)

Full Changelog: v0.45.1...v0.45.2

Bug Fixes

• streaming: avoid invalid deser type error (#845) (72a2585)

0.45.1 (2025-01-27)

Full Changelog: v0.45.0...v0.45.1

Bug Fixes

• streaming: accumulate citations (#844) (e665f2f)

Chores

• docs: updates (#841) (fb10a7d)

0.45.0 (2025-01-23)

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

Features

• api: add citations (#839) (2ec74b6)
• client: support results endpoint (#835) (5dd88bf)

Chores

• internal: minor formatting changes (#838) (31eb826)

0.44.0 (2025-01-21)

Full Changelog: v0.43.1...v0.44.0

Features

• streaming: add request_id getter (#831) (fb397e0)

Bug Fixes

• tests: make test_get_platform less flaky (#830) (f2c10ca)

Chores

• deprecate more models (c647e25)
• internal: avoid pytest-asyncio deprecation warning (#832) (2b3ceff)
• internal: minor style changes (#833) (65cfb7b)

Documentation

• raw responses: fix duplicate the (#828) (ff850f8)

0.43.1 (2025-01-17)

Full Changelog: v0.43.0...v0.43.1

Bug Fixes

• docs: correct results return type (69ad511)

Chores

• internal: bump pyright dependency (#822) (f8ddb90)
• internal: fix lint (483cc27)
• streaming: add runtime type check for better error messages (#826) (cf69e09)
• types: add more discriminator metadata (#825) (d0de8e5)