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v1.56.0

pydantic/pydantic-aiv1.56.0Feb 6, 2026by DouweM

AI Summary

Introduces support for Claude Opus 4.6 and new Anthropic settings, alongside security improvements regarding local network file downloads.

Key Highlights

  • Added Claude Opus 4.6 support with `anthropic_effort` and `anthropic_thinking.type='adaptive'`
  • Added `anthropic_betas` to `AnthropicModelSettings`
  • Fixed Bedrock `CachePoint` placement with multiple trailing documents
  • Disallowed downloading `FileUrl`s pointing at the local network by default

New Features

  • Claude Opus 4.6 support
  • `anthropic_betas` setting

Full Release Notes

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

## What's Changed
### 🚀 Features
* Add Claude Opus 4.6, `anthropic_effort` and `anthropic_thinking.type='adaptive'` by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/4216
* Add `anthropic_betas` to `AnthropicModelSettings` by @bohdanhr in https://github.com/pydantic/pydantic-ai/pull/4180
### 🐛 Bug Fixes
* Fix Bedrock `CachePoint` placement with multiple trailing documents by @psg2 in https://github.com/pydantic/pydantic-ai/pull/4207
* Disallow downloading `FileUrl`s pointing at the local network by default by @DouweM in https://github.com/pydantic/pydantic-ai/pull/4227


**Full Changelog**: https://github.com/pydantic/pydantic-ai/compare/v1.55.0...v1.56.0