Pydantic AI v2.45.0 (2026-09-17)
Pydantic AI releases published Pydantic AI v2.45.0 (2026-09-17). What's Changed 🚀 Features Add TypeSafeModel for TypeSafe's Jev by @adtyavrdhn in 8450 🐛 Bug Fixes Pass xhigh effort through on Bedrock when the model profile supports it by @willfrey in 8392 Allow gpt-5.6-sol , gpt-5.6-luna , and gpt-5.6-terra on Bedrock Converse by @pydanty in 7825 Resolve…
Why this signal matters
Pydantic AI releases published Pydantic AI v2.45.0 (2026-09-17). This 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 🚀 Features Add TypeSafeModel for TypeSafe's Jev by @adtyavrdhn in 8450 🐛 Bug Fixes Pass xhigh effort through on Bedrock when the model profile supports it by @willfrey in 8392 Allow gpt-5.6-sol , gpt-5.6-luna , and gpt-5.6-terra on Bedrock Converse by @pydanty in 7825 Resolve a DynamicToolset once per durable run instead of inside every durable unit by @DouweM in 8455 Hold one MCP server session per durable run instead of one per durable unit by @DouweM in 8463 Preserve tool history in MCPSamplingModel by @DouweM in 8466 Stop importing legacy httpx in pydantic ai.mcp , which a FastMCP 4 install does not ship by @DouweM in 8461 Report each agent run's own usage on its span by @DouweM in 8456 New Contributors @willfrey made their first contribution in 8392 Full Changelog : v2.44.0...v2.45.0
Actionable summary
Treat Pydantic AI v2.45.0 (2026-09-17) as an official release signal. Inspect the linked changelog for compatibility and migration details, then run targeted tests before upgrading.
- Agent usefulness
- 82/100
- Confidence
- 96%
- Canonical data
- JSON + Markdown
What builders should check
- 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.