Pydantic AI 2.51.0 adds OpenAI GPT-Live support

Pydantic

Tools official 1 src. ~1 min

Adds OpenAILiveModel for GPT-Live realtime sessions, exposes context_window_used on realtime sessions, and hardens Gemini Live and realtime tool_choice behavior, plus a cached agent graph that no longer rebuilds per run. This follows v2.49.0 from earlier in the week.

Why it matters

First-class OpenAI realtime support in a typed agent framework lowers the floor for voice/realtime agents.

Importance: 2/5

Notable minor release adding realtime support

pydantic-ai framework realtime

Sources

official Pydantic AI v2.51.0 release notes