AI library

Source · release

Pydantic AI v2.54.0

Author
Pydantic
Published
2 October 2026
Added
4 October 2026
Original
https://github.com/pydantic/pydantic-ai/releases/tag/v2.54.0

Summary

Minor release of Pydantic AI, the typed Python agent framework, now on a 2.x line with near-daily minor releases. This release mainly improves its clai2 terminal agent and OpenAI live (realtime) model support. The note also records the recent minor releases, which add sandboxed workspaces and plugins.

Key points

  • v2.54.0 (2026-10-02): theme-aware file diffs, /update self-update with session resume, and a double-Esc rewind menu in clai2; reconnecting dropped OpenAI Live sessions; web search on GPT-Live through delegated backends; a run now ends when a background tool raises an unexpected exception.
  • v2.53.0 (2026-10-01): security fix for streamed requests in ConcurrencyLimitedModel; declarative plugins for clai2.
  • v2.52.0 (2026-09-29): workspaces with one file and command API across local and sandbox environments; sandbox backends include Sprites, E2B, SSH, and Bubblewrap.
  • v2.51.0 (2026-09-25): OpenAILiveModel for OpenAI GPT-Live.

Why it matters

Pydantic AI has grown from a typed agent library into a fuller agent runtime with its own CLI agent and sandboxing, overlapping with coding-agent tools.