pydantic-ai

v2.5.1 Breaking

This release includes breaking changes for platform teams planning a safe upgrade.

Published 20d AI Agents & Assistants

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Topics

agent-framework genai llm pydantic python

Summary

AI summary

Updates 🐛 Bug Fixes, bedrock, and fix across a mixed release.

Full changelog

What's Changed

🐛 Bug Fixes

fix(bedrock): handle toolResult attachment co-location per-model via bedrock_tool_result_colocatable_content by @Hasnaathussain in https://github.com/pydantic/pydantic-ai/pull/6098
fix(groq): map unified thinking setting to Groq reasoning_effort by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/6231
fix(evals): reject non-positive OnlineEvaluator.max_concurrency by @VectorPeak in https://github.com/pydantic/pydantic-ai/pull/6267
fix: write relative schema refs for AgentSpec files by @VectorPeak in https://github.com/pydantic/pydantic-ai/pull/6251
fix(agent): honor end_strategy="early" for NativeOutput by @Oxygen56 in https://github.com/pydantic/pydantic-ai/pull/6279
send retry prompt for empty model responses instead of silent resubmit by @dcosson in https://github.com/pydantic/pydantic-ai/pull/5643
Preserve FileUrl.force_download in UI round-trips by @HarperZ9 in https://github.com/pydantic/pydantic-ai/pull/6205
Exclude deprecated Bedrock gateway model anthropic.claude-3-5-sonnet-20240620-v1:0 by @ddanielcruzz in https://github.com/pydantic/pydantic-ai/pull/6297
fix: preserve union NativeOutput description instead of last member's docstring by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/6265
fix(bedrock): deliver unsupported tool-return media to models that isolate toolResult turns by @DouweM in https://github.com/pydantic/pydantic-ai/pull/6259
Revert "fix(agent): honor end_strategy="early" for NativeOutput" by @DouweM in https://github.com/pydantic/pydantic-ai/pull/6301
Accept thinking-only responses when output_type allows None by @kmike in https://github.com/pydantic/pydantic-ai/pull/5146
Omit empty ModelResponse from Mistral and Cohere request payloads by @DouweM in https://github.com/pydantic/pydantic-ai/pull/6302

New Contributors

@Hasnaathussain made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6098
@saime428 made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6268
@NotFoundOvO made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6285
@dcosson made their first contribution in https://github.com/pydantic/pydantic-ai/pull/5643
@HarperZ9 made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6205
@kmike made their first contribution in https://github.com/pydantic/pydantic-ai/pull/5146

Full Changelog: https://github.com/pydantic/pydantic-ai/compare/v2.5.0...v2.5.1

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AI Agent Framework, the Pydantic way

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