release: 0.122.0

[stainless-app]

Automated Release PR

0.122.0 (2026-08-11)

Full Changelog: v0.121.0...v0.122.0

Features

• api: add output_behavior to dream creation (create a new memory store or update the input store in place) (852c4bb)

Bug Fixes

• bedrock,aws: run SigV4 signing off the event loop in async clients (#334) (2bae6c8)
• bedrock: expose beta.messages.parse, stream and tool_runner (#366) (6eca7bb)
• client: add models (52e9d94)
• client: read PathLike contents passed inside a file tuple (070f953)
• client: treat empty ANTHROPIC_API_KEY / ANTHROPIC_AUTH_TOKEN as unset (#341) (76a2e68)
• streaming: add context to malformed tool input JSON errors in the non-beta accumulator (#339) (a343e17)
• streaming: apply all message_delta fields when accumulating streamed messages (#380) (fc1599b)
• streaming: emit input_json events for server tool use blocks (#336) (ccfc8e1)
• streaming: run the request transform once in messages.stream() (#347) (81a92da)
• streaming: silence pydantic serializer warnings on message_stop events (#338) (41f9cdc)
• tools: reject symlink loops in tool paths and skip special skill-archive members (#322) (43e8669)
• vertex: expose beta.messages.parse and tool_runner (#367) (96723a0)

Chores

• examples: update messages_stream.py shebang from rye to uv (#1519) (7d72364)
• internal: remove misc things (d6ee99e)

Documentation

• fix fulfillment typos in session runner (#1795) (009b035)
• fix incorrect docstring in AsyncAnthropicFoundry.models (#1592) (f1f5e9b)

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[stainless-app]

🧪 Testing

To try out this version of the SDK:

pip install 'https://pkg.stainless.com/s/anthropic-python/d6ee99e8b90f3921f74a2768748f0eea912c1dfd/anthropic-0.121.0-py3-none-any.whl'

Expires at: Thu, 10 Sep 2026 19:59:10 GMT
Updated at: Tue, 11 Aug 2026 19:59:10 GMT