pydantic-ai

v1.99.0 Feature

This release adds 1 notable feature for engineering teams evaluating rollout.

Published 15d AI Agents & Assistants

✓ No known CVEs patched

✓ No known CVEs patched in this version

Topics

agent-framework genai llm pydantic python

Summary

AI summary

Added the gemini-3.5-flash model.

Type	Severity	Summary	CVE
Feature	Medium	Add gemini-3.5-flash model Add gemini-3.5-flash model Source: granite4.1:8b-q6_K@2026-05-20 Confidence: low	—
Bugfix	Medium	Avoid OpenAI strict schemas with regex lookarounds Avoid OpenAI strict schemas with regex lookarounds Source: granite4.1:8b-q6_K@2026-05-20 Confidence: high	—

Full changelog

Add gemini-3.5-flash model by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/5527

Avoid OpenAI strict schemas with regex lookarounds by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/5519

Full Changelog: https://github.com/pydantic/pydantic-ai/compare/v1.98.0...v1.99.0

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About pydantic-ai

AI Agent Framework, the Pydantic way

v1.95.0 rename ‘built-in tools’ to ‘native tools’, deprecate old fields, register via capabilities=[NativeTool(...)]