pydantic-ai

v2.1.0 Feature

This release adds 3 notable features for engineering teams evaluating rollout.

Published 27d AI Agents & Assistants

✓ No known CVEs patched

✓ No known CVEs patched in this version

Topics

agent-framework genai llm pydantic python

Summary

AI summary

Updates 🐛 Bug Fixes, 🚀 Features, and feat across a mixed release.

Full changelog

feat: Add Anthropic _20260209 web tools with server-tool replay by @adtyavrdhn in https://github.com/pydantic/pydantic-ai/pull/4844
Serialize instrumentation message attributes with to_json instead of json.dumps by @Kludex in https://github.com/pydantic/pydantic-ai/pull/6045
Add TypeAdapter for EvaluatorContext by @hon-gyu in https://github.com/pydantic/pydantic-ai/pull/3373

Convert ExceptionGroup-wrapped tool errors to ModelRetry in MCPToolset by @dmontagu in https://github.com/pydantic/pydantic-ai/pull/6004
fix: prevent cancel() from flipping complete state on finished stream by @Oxygen56 in https://github.com/pydantic/pydantic-ai/pull/5795
fix(temporal): add return type annotation to PydanticAIPlugin.__init__ by @syf2211 in https://github.com/pydantic/pydantic-ai/pull/6065
fix(anthropic): support Bedrock token counting by @dyscott in https://github.com/pydantic/pydantic-ai/pull/5480

@lucaszhu-hue made their first contribution in https://github.com/pydantic/pydantic-ai/pull/5982
@syf2211 made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6065
@dyscott made their first contribution in https://github.com/pydantic/pydantic-ai/pull/5480
@hon-gyu made their first contribution in https://github.com/pydantic/pydantic-ai/pull/3373

Full Changelog: https://github.com/pydantic/pydantic-ai/compare/v2.0.0...v2.1.0

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About pydantic-ai

AI Agent Framework, the Pydantic way