pydantic-ai

v2.16.0 Feature

This release adds 6 notable features for engineering teams evaluating rollout.

Published 4d AI Agents & Assistants

✓ No known CVEs patched

✓ No known CVEs patched in this version

Topics

agent-framework genai llm pydantic python

Affected surfaces

deps

Summary

AI summary

Updates 🚀 Features, 🐛 Bug Fixes, and 📦 Dependencies across a mixed release.

Full changelog

Add mistral_prompt_cache_key setting and pass parallel_tool_calls to the Mistral SDK by @lionpeloux in https://github.com/pydantic/pydantic-ai/pull/6654
Add ToolFailed for model-visible failures without retries by @adtyavrdhn in https://github.com/pydantic/pydantic-ai/pull/5585
Add optional run_id= to agent runs, durable wrappers, and UI adapters by @grahamcracker1234 in https://github.com/pydantic/pydantic-ai/pull/6615
Hoist openai_moderation to OpenAIChatModelSettings and expose Chat Completions moderation results in provider_details by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/6658
feat(google): add Model Armor support for Google Cloud via GoogleModelSettings by @Alex-Resch in https://github.com/pydantic/pydantic-ai/pull/5691
Add gemini-3.6-flash and gemini-3.5-flash-lite models by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/6668

Raise a consistent ctx.enqueue() error inside durable units across Temporal, DBOS, and Prefect by @DouweM in https://github.com/pydantic/pydantic-ai/pull/6666
Preserve $ref sibling keywords when inlining $defs by @lntutor in https://github.com/pydantic/pydantic-ai/pull/6592
Guard ctx.enqueue() from an event_stream_handler inside DBOS steps / Prefect tasks by @DouweM in https://github.com/pydantic/pydantic-ai/pull/6671
Preserve failed tool outcomes across AG-UI message round trips by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/6659
Fix tool retry counts across skipped steps by @zcxGGmu in https://github.com/pydantic/pydantic-ai/pull/6582

Bump pillow, pyasn1, and setuptools to resolve Dependabot alerts by @hramezani in https://github.com/pydantic/pydantic-ai/pull/6657

@AKSHITAK1040 made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6633
@grahamcracker1234 made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6615
@sergioperezcheco made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6585
@lntutor made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6592
@zcxGGmu made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6582

Full Changelog: https://github.com/pydantic/pydantic-ai/compare/v2.15.0...v2.16.0

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About pydantic-ai

AI Agent Framework, the Pydantic way