pydantic-ai 1.4.0

v1.4.0 (2025-10-23)

on Python PyPI

What's Changed

• Support OpenAI and Anthropic native MCP support via MCPServerTool builtin tool by @Artui in #3101, #3239
• Use correct agent's instructions when telling model to retry output by @dsfaccini in #3209
• Raise clear error when any Google content filter is hit resulting in empty response by @DouweM in #3236
• Expand docs for pydantic-evals by @dmontagu in #3213

New Contributors

• @Artui made their first contribution in #3101

Full Changelog: v1.3.0...v1.4.0