Anthropic SDK (Python) releases · August 20, 2026 · 1 min read

v1.0.0

#version-bump #developer-tool

Mirrored from Anthropic SDK (Python) releases for archival readability. Support the source by reading on the original site.

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1.0.0 (2026-08-20)

Full Changelog: v0.125.0...v1.0.0

⚠ BREAKING CHANGES

client: upgrade to httpx2 and some minor breaking changes. See MIGRATION.md for details

Features

client: upgrade to httpx2 and some minor breaking changes. See MIGRATION.md for details (33e2967)

Bug Fixes

beta: stop warning about output_format= on the parse/stream/tool_runner helpers (59bf261)

Chores

streaming: restore the original event imports in lib/streaming/_types.py (87e9e01)

Documentation

examples: use adaptive thinking in thinking examples (b5870af)

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