Pydantic AI v2.42.0 (2026-09-08)

Pydantic AI releases published Pydantic AI v2.42.0 (2026-09-08). 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 ⚠️ Compatibility Notes Reject invalid DeferredToolResults.approvals values by @adtyavrdhn in https://github.com/pydantic/pydantic-ai/pull/8081 🚀 Features Add a GitHubCopilotProvider for GitHub Copilot's OpenAI-compatible API by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/8059 🐛 Bug Fixes Honor anthropic disallows sampling settings in BedrockConverseModel by @rscholz98 in https://github.com/pydantic/pydantic-ai/pull/7961 Resolve non-object $ref definitions inline in code-mode function signatures by @pydanty (https://github.com/apps/pydanty) in https://github.com/pydantic/pydantic-ai/pull/8056 Validate ToolReturnContent without a Python call per JSON node by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/7823 Preserve Anthropic recovery across normalized history by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/8040 New Contributors…

• 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.