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Pydantic AI Updates: August 28, 2026

pydantic-ai release durable-execution dependencies

1. Pydantic AI v2.35.3 Fixes Heroku GLM Routing and Durable Execution Errors

Pydantic AI. Pydantic AI released v2.35.3, a patch that routes Heroku GLM models through zai_model_profile and identifies rejected runtime toolsets in durable execution errors. The release also scopes safe_download cookies to their original hostnames and fixes DeferredToolRequests.remaining so it no longer resolves cross-category result IDs. It further un-caps the dbos extra dependency and moves opentelemetry-instrumentation-logging to a test-only dependency. Source