v1.34.0

1.34.0 (2026-04-09)

Full Changelog: v1.33.0...v1.34.0

Features

• api: Add beta advisor tool (3a6ddba)

v1.33.0

1.33.0 (2026-04-08)

Full Changelog: v1.32.0...v1.33.0

Features

• api: add support for Claude Managed Agents (722b2ac)

v1.32.0

1.32.0 (2026-04-07)

Full Changelog: v1.31.0...v1.32.0

Features

• bedrock: add AnthropicBedrockMantle client (#704) (058e8fa)

v1.31.0

1.31.0 (2026-04-07)

Full Changelog: v1.30.0...v1.31.0

Features

• api: Add support for claude-mythos-preview (7144a65)

v1.30.0

1.30.0 (2026-04-03)

Full Changelog: v1.29.0...v1.30.0

Features

• vertex: add support for US multi-region endpoint (6f40457)

v1.29.0

1.29.0 (2026-04-01)

Full Changelog: v1.28.0...v1.29.0

Features

• api: add structured stop_details to message responses (1053799)

Chores

• internal: client updates (531283d)

v1.28.0

1.28.0 (2026-03-31)

Full Changelog: v1.27.1...v1.28.0

Features

• internal: support comma format in multipart form encoding (97ed8a1)

Bug Fixes

• bump buger/jsonparser to v1.1.2 (GO-2026-4514) (#665) (96565eb)
• prevent duplicate ? in query params (0afa75c)
• types: generate shared enum types that are not referenced by other schemas (5dc86f2)

Chores

• ci: run builds on CI even if only spec metadata changed (010a16f)
• ci: skip lint on metadata-only changes (8cc7cec)
• ci: support opting out of skipping builds on metadata-only commits (adc7184)
• client: fix multipart serialisation of Default() fields (3fc3613)
• internal: bump go toolchain to go1.25.8 to address std lib vulnerabilities (e3feecb)
• internal: support default value struct tag (fc68556)
• internal: update gitignore (e2a5dd1)
• remove unnecessary error check for url parsing (6d42216)
• tests: bump steady to v0.19.4 (3ca1569)
• tests: bump steady to v0.19.5 (7364e49)
• tests: bump steady to v0.19.6 (28ebd01)
• tests: bump steady to v0.19.7 (77fc869)
• tests: bump steady to v0.20.1 (e52beb5)
• tests: bump steady to v0.20.2 (3a20191)
• update docs for api:"required" (aa0a03a)

v1.27.1

1.27.1 (2026-03-18)

Full Changelog: v1.27.0...v1.27.1

Chores

• internal: regenerate SDK with no functional changes (c963fd0)
• internal: tweak CI branches (95e3410)

v1.27.0

1.27.0 (2026-03-16)

Full Changelog: v1.26.0...v1.27.0

Features

• api: change array_format to brackets (ca5ae6e)
• api: chore(config): clean up model enum list (#31) (1db4ea7)
• api: GA thinking-display-setting (1924af2)
• api: remove publishing section from cli target (514282e)
• tests: update mock server (cf24ced)

Bug Fixes

• allow canceling a request while it is waiting to retry (32ee053)
• client: update model reference from claude-3-7-sonnet-latest to claude-sonnet-4-5 (2f42e73)

Chores

• client: reorganize code in Messages files to lead to less conflicts (c677bb5)
• internal: codegen related update (c978aac)
• internal: codegen related update (4ac31a2)
• internal: codegen related update (5b2b2fa)
• internal: codegen related update (9678c6c)
• internal: codegen related update (f6035d2)
• internal: codegen related update (9246bbb)
• internal: move custom custom json tags to api (4392627)
• tests: unskip tests that are now supported in steady (b0ca374)

Documentation

• streamline README, centralize documentation at docs.anthropic.com (33f6943), closes #587

v1.26.0

1.26.0 (2026-02-19)

Full Changelog: v1.25.1...v1.26.0

Features

• api: Add top-level cache control (automatic caching) (75f9f70)
• client: add BetaToolRunner for automatic tool use loops (#603) (e44128a)

Chores

• internal: codegen related update (6247d2f)