v2.31.1

pydantic/pydantic-aiv2.31.1Aug 18, 2026by dsfaccini

AI Summary

Fixes compatibility issues with Bedrock and Gemini models to ensure structured output and thinking levels function correctly across different providers.

Key Highlights

Fixed native structured output for Claude Sonnet 5 and Fable 5 on Bedrock
Fell back to `thinking_level='LOW'` for Gemini models rejecting `MINIMAL`

Full Release Notes

<!-- Release notes generated using configuration in .github/release.yml at main -->

## What's Changed
### 🐛 Bug Fixes
* Deny native structured output for Claude Sonnet 5 and Fable 5 on Bedrock by @pydanty[bot] in https://github.com/pydantic/pydantic-ai/pull/7374
* Fall back to `thinking_level='LOW'` for Gemini models that reject `MINIMAL` by @pydanty[bot] in https://github.com/pydantic/pydantic-ai/pull/7469


**Full Changelog**: https://github.com/pydantic/pydantic-ai/compare/v2.31.0...v2.31.1