# Claude Fable 5 access restored on AI Gateway

Source: [Vercel](https://vercel.com/changelog/claude-fable-5-access-restored-on-ai-gateway)  
Feed7 permalink: https://feed7.dev/p/claude-fable-5-access-restored-on-ai-gateway-02xps4t  
Published: Unknown  
Trust: Official Source (official_source)

## Why Included

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).

## Source Summary

**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.

## Practical Implication

**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.

## Agent-Ready Context

**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.

## Context Map

- Layer: model
- Domains: coding
- Topics: gateways, model-selection, agent-reliability

## Uncertainty

- 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.

## Agent Instruction

Use this item as source-backed context. Do not invent claims beyond the linked source. If this item conflicts with another source, call out the conflict.