pydantic-ai 2.34.0

v2.34.0 (2026-08-24)

on Python PyPI

What's Changed

🚀 Features

• Add a LangChain migration skill by @adtyavrdhn in #7679
• Add GLM-5.3 support to ZaiModel by @aisk in #7600

🐛 Bug Fixes

• Fix TestModel generation for equal inclusive bounds by @pydanty[bot] in #7642
• Render enum $refs as Literal in FunctionSignature by @pydanty[bot] in #7579
• Fix TestModel generation of falsy JSON Schema const values by @pydanty[bot] in #7630
• Fix stale UIEventStream part state on cancellation by @adtyavrdhn in #7675
• Only strip logit_bias from Cerebras model settings by @ryanl-cerebras in #7653
• Fix VercelAIAdapter rejecting reasoning part id in run input by @pydanty[bot] in #7706
• Fix dropped zero-argument tool calls in CohereModel by @pydanty[bot] in #7720
• Fix VercelProvider dropping the Groq profile for groq/-prefixed models by @pydanty[bot] in #7551
• fix(evals): honor zero-valued SpanQuery maximums by @lntutor in #6934
• Handle asctime-form Retry-After dates in wait_retry_after() by @parveshsaini in #7711
• Honor agent tool retry budget for load_capability by @lntutor in #6937
• Recognize Bedrock’s r1 alias in deepseek_model_profile() by @adtyavrdhn in #7723

New Contributors

• @brianosaurus made their first contribution in #7522
• @junqi410-create made their first contribution in #7669
• @aisk made their first contribution in #7600
• @ryanl-cerebras made their first contribution in #7653
• @parveshsaini made their first contribution in #7711

Full Changelog: v2.33.0...v2.34.0