pydantic-ai 2.17.0

v2.17.0 (2026-07-23)

on Python PyPI

What's Changed

🚀 Features

• Make RequestUsage and RunUsage support arbitrary fields for upcoming genai-prices by @alexmojaki in #6683
• Cache per-message OTel serialization to avoid O(n²) instrumentation cost by @dsfaccini in #6635

🐛 Bug Fixes

• Fix ContentFilterError for real Model Armor response blocks (finishReason: MODEL_ARMOR) and record moderation wire-truth cassettes by @dsfaccini in #6679

Full Changelog: v2.16.0...v2.17.0