pydantic-ai

v1.94.0 Breaking

This release includes 1 breaking change for platform teams planning a safe upgrade.

Published 22d AI Agents & Assistants

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Topics

agent-framework genai llm pydantic python

ReleasePort's take

Moderate signal

editorial:auto 13d

Pydantic‑AI v1.94.0 adds the openai_chat_supports_multiple_system_messages profile flag and removes the mistralai dependency.

Why it matters: Plan a migration if your code relies on mistralai; test the new OpenAI profile flag in development environments before production use.

Summary

AI summary

Removed mistralai dependency.

Changes in this release

Type	Severity	Summary	CVE
Feature	Medium	Added openai_chat_supports_multiple_system_messages profile flag Added openai_chat_supports_multiple_system_messages profile flag Source: llm_adapter@2026-05-21 Confidence: low	—
Deprecation	Medium	Dropped mistralai dependency from pydantic-ai Dropped mistralai dependency from pydantic-ai Source: llm_adapter@2026-05-21 Confidence: low	—

Full changelog

What's Changed

🚀 Features

feat(openai): add openai_chat_supports_multiple_system_messages profile flag by @DouweM in https://github.com/pydantic/pydantic-ai/pull/5375

📦 Dependencies

Drop mistralai as dependency from pydantic-ai by @Kludex in https://github.com/pydantic/pydantic-ai/pull/5384

Full Changelog: https://github.com/pydantic/pydantic-ai/compare/v1.93.0...v1.94.0

Breaking Changes

Removed `mistralai` as a dependency from `pydantic-ai`.

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About pydantic-ai

AI Agent Framework, the Pydantic way

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Earlier breaking changes

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