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v1.37.0

pydantic/pydantic-aiv1.37.0Dec 20, 2025by DouweM

AI Summary

This release enhances Temporal Agent capabilities by allowing model switching at runtime and supports new image generation options for Vertex AI. It also fixes a duplicate message issue in streaming output.

Key Highlights

  • Allow `TemporalAgent` to switch model at `agent.run`-time
  • Add `DynamicToolset` support in Temporal
  • Support for `ImageGenerationTool` output compression and format
  • Fix `StreamedRunResult.get_output()` creating duplicate messages

New Features

  • Temporal model switching
  • DynamicToolset support
  • Image generation output options
  • Streaming output duplication fix

Full Release Notes

## What's Changed
* Allow `TemporalAgent` to switch model at `agent.run`-time by @mattbrandman in https://github.com/pydantic/pydantic-ai/pull/3537
* Add `DynamicToolset` support in Temporal by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/3682
* Add support for `ImageGenerationTool` `output_compression` and `output_format` for Vertex AI Gemini image models by @h0rv in https://github.com/pydantic/pydantic-ai/pull/3759
* Update known Groq model names (add production/preview, remove deprecated) by @hima12-awny in https://github.com/pydantic/pydantic-ai/pull/3774
* Add model profile flag for APIs that support native output but still require JSON schema in instructions by @xcpky in https://github.com/pydantic/pydantic-ai/pull/3744
* Set `ToolRetryError` message by @jamesaud in https://github.com/pydantic/pydantic-ai/pull/3718
* Fix `StreamedRunResult.get_output()` creating duplicate messages if `stream_output()` has already been called by @DouweM in https://github.com/pydantic/pydantic-ai/pull/3777
* Re-add `clai --help` output to clai README by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/3766

## New Contributors
* @hima12-awny made their first contribution in https://github.com/pydantic/pydantic-ai/pull/3774
* @jamesaud made their first contribution in https://github.com/pydantic/pydantic-ai/pull/3718

**Full Changelog**: https://github.com/pydantic/pydantic-ai/compare/v1.36.0...v1.37.0