@anthropic-ai/sdk

Full Changelog: sdk-v0.30.0...sdk-v0.30.1

Bug Fixes

• bedrock: correct messages beta handling (9b57586)
• vertex: correct messages beta handling (26f21ee)

Chores

• internal: bumps eslint and related dependencies (#570) (0b3ebb0)

Full Changelog: sdk-v0.29.2...sdk-v0.30.0

Features

• api: add new model and computer-use-2024-10-22 beta (6981d89)
• bedrock: add beta.messages.create() method (6317592)
• vertex: add beta.messages.create() (22cfdba)

Bug Fixes

• client: respect x-stainless-retry-count default headers (#562) (274573f)

Chores

• api: add title (#564) (a8b7544)
• internal: update spec (#566) (5b998ea)

Full Changelog: sdk-v0.29.1...sdk-v0.29.2

Bug Fixes

• types: remove misleading betas TypedDict property for the Batch API (#559) (4de5d0a)

Full Changelog: sdk-v0.29.0...sdk-v0.29.1

Bug Fixes

• beta: merge betas param with the default value (#556) (5520bbc)

Chores

• internal: update spec URL (#554) (1fb6448)

Full Changelog: sdk-v0.28.0...sdk-v0.29.0

Features

• api: add message batches api (4f114d5)

Chores

• internal: move LineDecoder to a separate file (#541) (fd42469)
• internal: pass props through internal parser (#549) (dd71955)

Refactors

• types: improve metadata type names (#547) (cef499c)
• types: improve metadata types (#546) (3fe538b)
• types: improve tool type names (#543) (18dbe77)
• types: improve tool type names (#544) (fc2d823)

Full Changelog: sdk-v0.27.3...sdk-v0.28.0

Features

• api: support disabling parallel tool use (#540) (df0032f)
• client: allow overriding retry count header (#536) (ec11f91)
• client: send retry count header (#533) (401b81c)

Bug Fixes

• types: remove leftover polyfill usage (#532) (ac188b2)

Chores

• better object fallback behaviour for casting errors (#503) (3660e97)
• better object fallback behaviour for casting errors (#526) (4ffb2e4)
• internal: add dev dependency (#531) (a9c127b)

Documentation

• improve and reference contributing documentation (#539) (cbef925)
• update CONTRIBUTING.md (#528) (2609dec)

Full Changelog: sdk-v0.27.2...sdk-v0.27.3

Bug Fixes

• streaming: correct error message serialisation (#524) (e150fa4)
• uploads: avoid making redundant memory copies (#520) (b6d2638)

Chores

• docs: update browser support information (#522) (ce7aeb5)

Full Changelog: sdk-v0.27.1...sdk-v0.27.2

Bug Fixes

• client: correct File construction from node-fetch Responses (#518) (62ae46f)

Chores

• api: deprecate claude-1 models (53644d2)
• ci: install deps via ./script/bootstrap (#515) (90a8da1)
• internal: dependency updates (#519) (b7b0cd6)
• run tsc as part of lint script (#513) (c8127cf)

Full Changelog: sdk-v0.27.0...sdk-v0.27.1

Chores

• ci: check for build errors (#511) (3ab1d3d)

Full Changelog: sdk-v0.26.1...sdk-v0.27.0

Features

• client: add support for browser usage (#504) (93c5f16)

Documentation

• readme: update formatting and clarity for CORS flag (9cb2c35)

Full Changelog: sdk-v0.26.0...sdk-v0.26.1

Chores

• ci: add CODEOWNERS file (#498) (c34433f)
• docs/api: update prompt caching helpers (04195a3)

Full Changelog: sdk-v0.25.2...sdk-v0.26.0

Features

• api: add prompt caching beta (c920b77)
• client: add streaming helpers (39abc26)

Chores

• examples: minor formatting changes (#491) (8afef58)

Full Changelog: sdk-v0.25.1...sdk-v0.25.2

Chores

• ci: bump prism mock server version (#490) (bfb27f5)
• ci: minor changes (#488) (747fd97)

Full Changelog: sdk-v0.25.0...sdk-v0.25.1

Chores

• internal: update publish npm script (#483) (fb862ff)
• internal: updates (#487) (67a3325)
• sync openapi version (#481) (5fd7e21)
• sync openapi version (#485) (e74c522)
• sync openapi version (#486) (ad98e9e)

Full Changelog: sdk-v0.24.3...sdk-v0.25.0

Features

• add back compat alias for InputJsonDelta (8b08161)
• client: make request-id header more accessible (#462) (5ea6f8b)

Bug Fixes

• compat: remove ReadableStream polyfill redundant since node v16 (#478) (75f5710)
• use relative paths (#475) (a8ca93c)

Chores

• bedrock: use chunk for internal SSE parsing instead of completion (#472) (0f6190a)
• ci: also run workflows for PRs targeting next (#464) (cc405a8)
• docs: fix incorrect client var names (#479) (a247935)
• docs: mention lack of support for web browser runtimes (#468) (968a7fb)
• docs: minor update to formatting of API link in README (#467) (50b9f2b)
• docs: rename anthropic const to client (#471) (e1a7f9f)
• docs: use client instead of package name in Node examples (#469) (8961ebf)
• internal: add constant for default timeout (#480) (dc89753)
• internal: minor changes to tests (#465) (c1fd563)
• internal: remove old reference to check-test-server (8dc9afc)
• sync spec (#470) (b493aa4)
• tests: update prism version (#473) (6f21ecf)

Refactors

• extract model out to a named type and rename partialjson (#477) (d2d4e36)

Full Changelog: sdk-v0.24.2...sdk-v0.24.3

Bug Fixes

• types: avoid errors on certain TS versions (dd6aca5)

Full Changelog: sdk-v0.24.1...sdk-v0.24.2

Bug Fixes

• partial-json: don't error on unknown tokens (d212ce1)
• partial-json: handle null token properly (f53742f)

Chores

• gitignore test server logs (#451) (ee1308f)
• tests: add unit tests for partial-json-parser (4fb3bea)

Full Changelog: sdk-v0.24.0...sdk-v0.24.1

Bug Fixes

• api: add string to tool result block (#448) (87af4e9)

Chores

• internal: minor reformatting (#444) (46790bb)
• internal: replace deprecated aws-sdk packages with @smithy (#447) (4328cbf)

Full Changelog: sdk-v0.23.0...sdk-v0.24.0

Features

• api: add new claude-3-5-sonnet-20240620 model (#438) (8d60d1b)

Full Changelog: sdk-v0.22.0...sdk-v0.23.0

Features

• support application/octet-stream request bodies (#436) (3a8e6ed)

Bug Fixes

• allow git imports for pnpm (#433) (a4f5263)

Full Changelog: sdk-v0.21.1...sdk-v0.22.0

Features

• api/types: add stream event type aliases with a Raw prefix (#428) (1e367e4)
• api: tool use is GA and available on 3P (#429) (2decf85)
• bedrock: support tools (91fc61a)
• streaming: add tools support (4c83bb1)
• vertex: support tools (acf0aa7)

Documentation

• helpers: mention inputJson event (0ef0e39)
• readme: add bundle size badge (#426) (bf7c1fd)

Full Changelog: sdk-v0.21.0...sdk-v0.21.1

Chores

• docs: fix typo (#423) (d42f458)
• internal: run build script over sub-packages (6f04f66)

Full Changelog: sdk-v0.20.9...sdk-v0.21.0

Features

• api: add tool_choice param, image block params inside tool_result.content, and streaming for tool_use blocks (#418) (421a1e6)

Chores

• docs: add SECURITY.md (#411) (bf2ad84)
• internal: add slightly better logging to scripts (#415) (7a042d2)
• internal: fix generated version numbers (#413) (ea77063)

Full Changelog: sdk-v0.20.8...sdk-v0.20.9

Bug Fixes

• package: revert recent client file change (#409) (9054249)

Chores

• internal: add link to openapi spec (#406) (39c856d)
• internal: bump prism version (#407) (0c1eb5d)
• internal: move client class to separate file (#408) (b5e1e4a)
• internal: refactor scripts (#404) (f60e2d8)

Full Changelog: sdk-v0.20.7...sdk-v0.20.8

Chores

• internal: add scripts/test and scripts/mock (#403) (bdc6011)
• internal: use actions/checkout@v4 for codeflow (#400) (6d565d3)

Full Changelog: sdk-v0.20.6...sdk-v0.20.7

Chores

• internal: use @swc/jest for running tests (#397) (0dbca67)

Full Changelog: sdk-v0.20.5...sdk-v0.20.6

Build System

• configure UTF-8 locale in devcontainer (#393) (db10244)

Full Changelog: sdk-v0.20.4...sdk-v0.20.5

Chores

• internal: formatting (#390) (b7861b9)

Full Changelog: sdk-v0.20.3...sdk-v0.20.4

Chores

• internal: update gitignore (#388) (03f03a2)

Full Changelog: sdk-v0.20.2...sdk-v0.20.3

Bug Fixes

• vertex: correct core client dependency constraint (#384) (de29699)

0.20.2 (2026-09-30)

Full Changelog: vertex-sdk-v0.20.1...vertex-sdk-v0.20.2

Chores

• client: deprecate sonnet 4.5 (d72cfaf)

0.20.1 (2026-09-30)

Full Changelog: vertex-sdk-v0.20.0...vertex-sdk-v0.20.1

0.20.0 (2026-09-28)

Full Changelog: vertex-sdk-v0.19.11...vertex-sdk-v0.20.0

Features

• api: add claude-sonnet-5-5 (4e77366)

Full Changelog: sdk-v0.19.1...sdk-v0.19.2

Bug Fixes

• streaming: handle special line characters and fix multi-byte character decoding (#370) (7a97b38)

Chores

• deps: bump yarn to v1.22.22 (#369) (603d7b1)
• deps: remove unused dependency digest-fetch (#368) (df1df0f)

Documentation

• readme: change undocumented params wording (#363) (4222e08)

Full Changelog: sdk-v0.19.0...sdk-v0.19.1

Bug Fixes

• client: correctly send deno version header (#354) (ad5162b)
• handle process.env being undefined in debug func (#351) (3b0f38a)
• streaming: correct accumulation of output tokens (#361) (76af283)
• types: correct typo claude-2.1' to claude-2.1 (#352) (0d5efb9)

Chores

• internal: add type (#359) (9456414)

Documentation

• bedrock: fix dead link (#356) (a953e00)
• readme: consistent use of sentence case in headings (#347) (30f45d1)
• readme: document how to make undocumented requests (#349) (f92c50a)

Full Changelog: sdk-v0.18.0...sdk-v0.19.0

Features

• vertex: add support for overriding google auth (#338) (28d98c4)
• vertex: api is no longer in private beta (#344) (892127c)

Bug Fixes

• internal: make toFile use input file's options (#343) (2dc2174)

Chores

• internal: update generated pragma comment (#341) (fd60f63)

Documentation

• fix typo in CONTRIBUTING.md (#340) (ba9f3fa)

Full Changelog: sdk-v0.17.2...sdk-v0.18.0

Features

• api: add haiku model (#333) (11becc6)

Documentation

• update models in vertex examples (#331) (3d139b3)

Full Changelog: sdk-v0.17.1...sdk-v0.17.2

Chores

• internal: add explicit type annotation to decoder (#324) (7e172c7)

Full Changelog: sdk-v0.17.0...sdk-v0.17.1

Documentation

• deprecate old access token getter (#322) (1110548)
• remove extraneous --save and yarn install instructions (#323) (775ecb9)

Full Changelog: sdk-v0.16.1...sdk-v0.17.0

Features

• api: add enum to model param for message (#315) (0c44de0)

Bug Fixes

• streaming: correctly handle trailing new lines in byte chunks (#317) (0147b46)

Chores

• types: fix accidental exposure of Buffer type to cloudflare (#319) (a5e4462)

Documentation

• readme: fix https proxy example (#310) (99d3c54)
• readme: fix https proxy example (#311) (ffb603c)

Full Changelog: sdk-v0.16.0...sdk-v0.16.1

Chores

• fix error handler in readme (#307) (5007a1e)

Documentation

• readme: reference bedrock sdk (#309) (0fd0416)

Full Changelog: sdk-v0.15.0...sdk-v0.16.0

Features

• bedrock: add messages API (#305) (8b7f89e)

Chores

• update examples (459956a)

Full Changelog: sdk-v0.14.1...sdk-v0.15.0

Features

• messages: add support for image inputs (#303) (7663bd6)

Bug Fixes

• MessageStream: handle errors more gracefully in async iterator (#301) (9cc0daa)

Chores

• docs: mention install from git repo (#302) (dd2627b)
• internal: update deps (#296) (8804a92)

Documentation

• contributing: improve wording (#299) (7697fa1)
• readme: fix typo in custom fetch implementation (#300) (a4974c3)

Full Changelog: sdk-v0.14.0...sdk-v0.14.1

Chores

• ci: update actions/setup-node action to v4 (#295) (359a856)
• docs: remove references to old bedrock package (#289) (33b935e)
• internal: refactor release environment script (#294) (b7f8714)

Documentation

• readme: fix header for streaming helpers (#293) (7278e6f)

Refactors

• api: mark completions API as legacy (#291) (c78e2e2)

Full Changelog: sdk-v0.13.1...sdk-v0.14.0

⚠ BREAKING CHANGES

• api: messages is generally available (#287)

Features

• api: messages is generally available (#287) (be0a828)

Full Changelog: sdk-v0.13.0...sdk-v0.13.1

Chores

• internal: reformat pacakge.json (#284) (3760c68)
• respect application/vnd.api+json content-type header (#286) (daf0cae)

Full Changelog: sdk-v0.12.8...sdk-v0.13.0

Features

• api: add new usage response fields (#281) (77bd18f)

Chores

• package: fix formatting (#283) (f88579a)

Full Changelog: sdk-v0.12.7...sdk-v0.12.8

Chores

• interal: make link to api.md relative (#278) (46f8c28)
• internal: enable building when git installed (#279) (3065001)

Documentation

• add a CONTRIBUTING.md (#280) (5b53551)

Full Changelog: sdk-v0.12.6...sdk-v0.12.7

Chores

• bedrock: move bedrock SDK to the main repo (#274) (b4ef3a8)
• ci: fix publish packages script (#272) (db3585d)

Full Changelog: sdk-v0.12.3...sdk-v0.12.4

Chores

• internal: add internal helpers & improve build scripts (#261) (4c1504a)
• internal: minor streaming updates (#264) (d4414ff)
• internal: update resource client type (#263) (bc4f115)

Full Changelog: v0.12.2...v0.12.3

Bug Fixes

• allow body type in RequestOptions to be null (#259) (2f98de1)

Full Changelog: v0.12.1...v0.12.2

Bug Fixes

• ci: ignore stainless-app edits to release PR title (#258) (87e4ba8)
• types: accept undefined for optional client options (#257) (a0e2c4a)
• use default base url if BASE_URL env var is blank (#250) (e38f32f)

Chores

• internal: debug logging for retries; speculative retry-after-ms support (#256) (b4b70fd)
• internal: narrow type into stringifyQuery (#253) (3f42e07)

Documentation

• fix missing async in readme code sample (#255) (553fb37)
• readme: improve api reference (#254) (3721927)

Full Changelog: v0.12.0...v0.12.1

Bug Fixes

• headers: always send lowercase headers and strip undefined (BREAKING in rare cases) (#245) (7703066)

Chores

• add .keep files for examples and custom code directories (#249) (26b9062)
• internal: improve type signatures (#247) (40edd29)

Full Changelog: v0.11.0...v0.12.0

⚠ BREAKING CHANGES

• remove anthropic-beta and x-api-key headers from param types (#243)

Bug Fixes

• remove anthropic-beta and x-api-key headers from param types (#243) (60f67ae)

Documentation

• readme: add streaming helper documentation (#238) (d74ee71)
• readme: remove old migration guide (#236) (65dff0a)
• reformat README.md (#241) (eb12705)

Refactors

• write jest config in typescript (#239) (7c87f24)

Full Changelog: v0.10.2...v0.11.0

Features

• api: add messages endpoint with streaming helpers (#235) (12b914f)
• client: support reading the base url from an env variable (#223) (5bc3600)

Chores

• ci: run release workflow once per day (#232) (115479f)
• deps: update dependency ts-jest to v29.1.1 (#233) (bec6ab1)
• deps: update jest (#234) (5506174)
• update dependencies (#231) (4e34536)
• update prettier (#230) (173603e)

Documentation

• update examples to show claude-2.1 (#227) (4b00d84)

Build System

• specify packageManager: yarn (#229) (d31dae4)

Full Changelog: v0.10.1...v0.10.2

Full Changelog: v0.10.0...v0.10.1

Chores

• internal: remove file import and conditionally run prepare (#217) (8ac5c7a)

Full Changelog: v0.9.1...v0.10.0

Features

• allow installing package directly from github (#215) (3de3f1b)

Chores

• ci: fix publish-npm (#213) (4ab77b7)
• internal: don't call prepare in dist (#216) (b031904)

Full Changelog: v0.9.0...v0.9.1

Chores

• ci: update release-please config (#206) (270b0b7)
• docs: fix github links (#208) (b316603)
• internal: update APIResource structure (#211) (0d6bbce)
• internal: update jest config (#210) (b0c64eb)
• internal: update tsconfig (#209) (81b3e0b)