anthropic 0.77.0

v0.77.0

on Python PyPI

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)