pydantic-ai

v1.96.0 Maintenance

This release keeps dependencies and maintenance posture current for teams operating this tool.

Published 21d AI Agents & Assistants

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agent-framework genai llm pydantic python

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editorial:auto 13d

Version v1.96.0 of pydantic‑ai introduces several deprecations to prepare for upcoming v2 changes.

Why it matters: Deprecate Agent(history_processors=), method‑style result usage access, AGUIApp, OutlinesModel and OutlinesProvider; migrate code before the next major release (v2).

Summary

AI summary

Deprecations announced for upcoming v2 changes.

Changes in this release

Type	Severity	Summary	CVE
Deprecation
Deprecation	Medium	Adds openai-chat: prefix; warns on bare openai: for v2 behavior switch Adds openai-chat: prefix; warns on bare openai: for v2 behavior switch Source: llm_adapter@2026-05-21 Confidence: high	—
Deprecation	Medium	Deprecates Agent(history_processors=) in favor of capabilities=[ProcessHistory(...)] Deprecates Agent(history_processors=) in favor of capabilities=[ProcessHistory(...)] Source: llm_adapter@2026-05-21 Confidence: high	—
Deprecation	Medium	Deprecates method-style result.usage(), result.timestamp(), stream.get() access Deprecates method-style result.usage(), result.timestamp(), stream.get() access Source: llm_adapter@2026-05-21 Confidence: high	—
Deprecation	Medium	Deprecates AGUIApp, Agent.to_ag_ui(), pydantic_ai.ag_ui in favor of AGUIAdapter Deprecates AGUIApp, Agent.to_ag_ui(), pydantic_ai.ag_ui in favor of AGUIAdapter Source: llm_adapter@2026-05-21 Confidence: high	—
Deprecation	Medium	Deprecates OutlinesModel and OutlinesProvider classes Deprecates OutlinesModel and OutlinesProvider classes Source: llm_adapter@2026-05-21 Confidence: high	—

Full changelog

What's Changed

🆕 V2 Preparation (coming in June)

Add openai-chat: prefix and warn on bare openai: which will switch to use the Responses API in v2 by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/5334
Deprecate Agent(history_processors=) in favor of capabilities=[ProcessHistory(...)] by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/5425
Deprecate method-style result.usage(), result.timestamp(), stream.get() in favor of property-style result.usage, result.timestamp, stream.response by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/5263
Deprecate AGUIApp, Agent.to_ag_ui(), and pydantic_ai.ag_ui shim in favor of AGUIAdapter by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/5345
Deprecate OutlinesModel and OutlinesProvider by @DouweM in https://github.com/pydantic/pydantic-ai/pull/5432