{"schemaVersion":"2026-07-21.signal.v2","id":"live-7d6321db364ba4d4a299","title":"Pydantic AI v2.55.0 (2026-10-09)","slug":"pydantic-ai-v2-55-0-pydantic-ai-v2-55-0-2026-10-09-d4a299","url":"https://www.niubiagent.com/signals/pydantic-ai-v2-55-0-pydantic-ai-v2-55-0-2026-10-09-d4a299","jsonUrl":"https://www.niubiagent.com/api/posts/pydantic-ai-v2-55-0-pydantic-ai-v2-55-0-2026-10-09-d4a299.json","markdownUrl":"https://www.niubiagent.com/content/pydantic-ai-v2-55-0-pydantic-ai-v2-55-0-2026-10-09-d4a299","summaryHuman":"Pydantic AI releases published Pydantic AI v2.55.0 (2026-10-09). What's Changed ⚠️ Compatibility Notes Require Python 3.11 or newer in every package; Python 3.10 installs resolve to 2.54.0 and earlier by @Kludex in https://github.com/pydantic/pydantic-ai/pull/9526 Record the tool requests of ExaSearch , YouSearch , LocalStack and other harness capabilities…","summaryAgent":"Treat Pydantic AI v2.55.0 (2026-10-09) as an official release signal. Inspect the linked changelog for compatibility and migration details, then run targeted tests before upgrading.","category":"agent-infrastructure","tags":["pydantic-ai","typed-agents","python"],"sourceName":"Pydantic AI releases","sourceUrl":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.55.0","publishedAt":"2026-10-09T19:20:25Z","curatedAt":"2026-10-10T00:17:41.788Z","confidence":0.96,"agentUsefulness":72,"sponsorIds":[],"language":"en","contentMode":"release-watch","verifiedAt":"2026-10-10T00:17:41.788Z","changeType":"release","actionItems":["Review the official Pydantic AI releases release notes before upgrading.","Check compatibility, migration, and security notes against your current agent stack.","Run focused regression tests before production rollout."],"body":"Pydantic AI releases published Pydantic AI v2.55.0 (2026-10-09). This automated release-watch entry was generated from the project's official GitHub release feed and is kept separate from human-reviewed editorial analysis. Release notes: What's Changed ⚠️ Compatibility Notes Require Python 3.11 or newer in every package; Python 3.10 installs resolve to 2.54.0 and earlier by @Kludex in https://github.com/pydantic/pydantic-ai/pull/9526 Record the tool requests of ExaSearch , YouSearch , LocalStack and other harness capabilities under durable execution by @DouweM in https://github.com/pydantic/pydantic-ai/pull/9705 Bound retained realtime audio like retained images with retain audio max seconds by @DouweM in https://github.com/pydantic/pydantic-ai/pull/9702 Prefix LogfireMCP tool names with logfire by @mpfaffenberger in https://github.com/pydantic/pydantic-ai/pull/9868 Serialize FileUrl.media type as null for extensionless URLs instead of raising by @pydanty (https://github.com/apps/pydanty) in https://github.com/pydantic/pydantic-ai/pull/8405 Take realtime history, usage, and reply waits from the session core on OpenAI,…","sponsors":[]}