pydantic-ai 2.31.1 · Bedrock structured-output deny for Sonnet 5 / Fable 5 — from issue No. 011nofeed.dev
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Issue No. 011 · 18 August 2026
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pydantic-ai 2.31.1 · Bedrock structured-output deny for Sonnet 5 / Fable 5

Native structured output is denied for Claude Sonnet 5 and Fable 5 on Bedrock; Gemini models that reject thinking_level=MINIMAL fall back to LOW.6

MATTERS TO · pydantic-ai agents on Bedrock or Gemini with strict schemas
WHAT THE VERDICT MEANS
Available, works, worth your time today.
Sources for this entry01 Cursor changelog — Origin Code Hosting (2026-08-18) · 02 GitHub status — Incident with GitHub.com (critical, 7.6h) (2026-08-18) · 03 Cursor status — GitHub degradation affecting Cursor services (major, 6.1h) (2026-08-18) · 04 github — claude-code v2.1.234 (2026-08-18) · 05 github — openai-python v3.2.0 (2026-08-18) · 06 github — pydantic-ai v2.31.1 (2026-08-18) · 07 HN — Cursor launches Origin (2026-08-18)

Also in this issue

read the whole thing →
Use itClaude Code 2.1.234 · auto-continue at usage-limit reset + NTLM path harden
Use itopenai-python 3.2.0 · Bedrock Runtime endpoint

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