Summary
Pydantic AI 2.33.0 requires and supports anthropic>=1.0.0 after fresh pydantic-ai[anthropic] installs could otherwise resolve an incompatible SDK and fail at runtime. Applications that pass a custom client to AnthropicProvider must now use httpx2.AsyncClient.
Why it matters
It is a concrete example of how fast-moving agent SDKs can break transitive integrations, and it gives application teams a precise upgrade or pinning path.
Related coverage
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