v1.34.0

pydantic/pydantic-aiv1.34.0Dec 16, 2025by DouweM

AI Summary

Adds a Web Chat UI for agents and improves file handling for Anthropic and OpenAI models. It also fixes compatibility issues with Temporal Agent and provider initialization.

Key Highlights

Add Web Chat UI for any agent
Support `FileUrl.force_download` in Anthropic and OpenAI
Fix sync history processors with TemporalAgent
Make OpenRouter and DeepSeek provider overloads less restrictive

New Features

Web Chat UI
Force download for file URLs
TemporalAgent sync history fix
Provider initialization improvements

Full Release Notes

## What's Changed
* Add Web Chat UI for any agent that can be launched using `clai web` or `Agent.to_web()` by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/3456
* Support `FileUrl.force_download` in `AnthropicModel` and `OpenAIResponsesModel` by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/3694
* Fix using sync history processors, instructions functions, and output functions with `TemporalAgent` by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/3704
* Make `OpenRouterProvider` and `DeepSeekProvider` `__init__` overloads less restrictive by @xcpky in https://github.com/pydantic/pydantic-ai/pull/3739
* Bump min version of griffe to `1.14.0` by @jerry-reevo in https://github.com/pydantic/pydantic-ai/pull/3743


**Full Changelog**: https://github.com/pydantic/pydantic-ai/compare/v1.33.0...v1.34.0