pydantic-ai 0.2.0

v0.2.0 (2025-05-12)

on Python PyPI

Breaking Changes

See #1647 — usage makes sense as part of ModelResponse, and could be really useful in "messages" (really a sequence of requests and response). In this PR:

• Adds usage to ModelResponse (field has a default factory of Usage() so it'll work to load data that doesn't have usage)
• changes the return type of Model.request to just ModelResponse instead of tuple[ModelResponse, Usage]

Other Changes

• Add support for non-string enums in Gemini by @zaidhaan in #1564
• Fix parallel tool calls on Bedrock with Nova and Claude models by @pandersen-uncharted in #1656
• Fix Anthropic streaming by @samuelcolvin in #1686
• Fix serializability of ModelRequestParameters by @dmontagu in #1690
• Stop incorrectly treating side-by-side JSON schema $refs as recursion by @DouweM in #1697
• Set ToolCallPartDelta.tool_call_id when known from previous delta by @DouweM in #1694

New Contributors

• @zaidhaan made their first contribution in #1564

Full Changelog: v0.1.11...v0.2.0