Claude Fable 5 access restored on AI Gateway
Claude Fable 5 is back on Vercel's AI Gateway after US export controls lifted. New, stricter safety classifiers can refuse routine coding calls, so configure model fallbacks; no Zero Data Retention (30-day hold).
**The gist** **Claude Fable 5**, Anthropic's Mythos-class model, is back on Vercel's AI Gateway after the **US Government lifted export controls**; it's the same model that was live **June 9–12**, now behind updated, more robust **safety classifiers**. Call it as anthropic/claude-fable-5.
**Why it matters** Configure **model fallbacks**: even routine **coding and debugging** requests may trip the classifiers, and the Gateway then tries your fallback list (e.g. **Opus 4.8**, Sonnet 5) in order, so agent pipelines keep running through refusals.
**The gist** **Claude Fable 5**, Anthropic's Mythos-class model, is back on Vercel's AI Gateway after the **US Government lifted export controls**; it's the same model that was live **June 9–12**, now behind updated, more robust **safety classifiers**. Call it as anthropic/claude-fable-5. **Why it matters** Configure **model fallbacks**: even routine **coding and debugging** requests may trip the classifiers, and the Gateway then tries your fallback list (e.g. **Opus 4.8**, Sonnet 5) in order, so agent pipelines keep running through refusals. **Watch out** No **Zero Data Retention** — prompts and completions are retained for **30 days** (not used for training) because some misuse patterns only appear across cumulative requests; that's a blocker if your contracts require ZDR.