🤖 feat: promote Claude Sonnet 5.1 as the sonnet model - #3992

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ThomasK33 wants to merge 6 commits into

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Commits on Aug 27, 2026

🤖 feat: promote Claude Fable 5.1 as the fable model
ibetitsmike
committed
e288521
fix: retain approximate-tokenizer overrides for retired fable-5/opus-4-8 ids
ibetitsmike
committed
8a2d5ca
fix: seed the legacy Fable 5 chain during the original seed pass for downgrade safety
ibetitsmike
committed
116066c
feat: promote Claude Sonnet 5.1 as the sonnet model
ThomasK33
committed
e01cbaf
fix: pin live-API Sonnet reasoning integration tests to claude-sonnet-5 until 5.1 exists
ThomasK33
committed
da0aa90
docs: make the release-day test flip-back an explicit merge-gate item
ThomasK33
committed
4ca4353