v1.19.0

1.19.0 (2026-02-07)

Full Changelog: v1.18.1...v1.19.0

Features

• api: enabling fast-mode in claude-opus-4-6 (c86a64f)

v1.18.1

1.18.1 (2026-02-07)

Full Changelog: v1.18.0...v1.18.1

Bug Fixes

• client: loosen json header parsing (8597448)

v1.18.0

1.18.0 (2026-02-05)

Full Changelog: v1.17.0...v1.18.0

Features

• api: Release Claude Opus 4.6, adaptive thinking, and other features (53027e2)

Bug Fixes

• client: always add content-length to post body, even when empty (359dcee)

Chores

• ci: remove claude-code-review workflow (4d513ef)
• docs: remove www prefix (306cdf9)

v1.17.0

1.17.0 (2026-01-29)

Full Changelog: v1.16.3...v1.17.0

Features

• api: add support for Structured Outputs in the Messages API (06e1fd9)
• api: migrate sending message format in output_config rather than output_format (13ac36e)
• client: migrate output config (#784) (d055b2b)

Chores

• add cgi gem as explicit dependency (b9ef072)
• client: mark claude-3-5-haiku as deprecated (2ed73fd)
• internal: update actions/checkout version (2f82126)
• internal: use different example values for some enums (13d8b68)

v1.16.3

1.16.3 (2026-01-05)

Full Changelog: v1.16.2...v1.16.3

Bug Fixes

• Use proper module name for structured output parsing (#769) (fdbe433)

Chores

• ci: Add Claude Code GitHub Workflow (#772) (6ebfa59)

v1.16.2

1.16.2 (2025-12-18)

Full Changelog: v1.16.1...v1.16.2

Bug Fixes

• issue where json.parse errors when receiving HTTP 204 with nobody (b453645)

v1.16.1

1.16.1 (2025-12-16)

Full Changelog: v1.16.0...v1.16.1

Bug Fixes

• calling break out of streams should be instantaneous (517711f)

v1.16.0

1.16.0 (2025-11-24)

Full Changelog: v1.15.2...v1.16.0

Features

• api: adds support for Claude Opus 4.5, Effort, Advance Tool Use Features, Autocompaction, and Computer Use v5 (54d3512)

Chores

• explicitly require "base64" gem (1224a32)

v1.15.2

1.15.2 (2025-11-19)

Full Changelog: v1.15.1...v1.15.2

Bug Fixes

• structured outputs: use correct beta header (0e92bf3)

v1.15.1

1.15.1 (2025-11-14)

Full Changelog: v1.15.0...v1.15.1