# Claude Fable 5 access restored on AI Gateway

DevFeed: [Claude Fable 5 access restored on AI Gateway](<https://devfeed.tech/articles/claude-fable-5-access-restored-on-ai-gateway-864.md>)

Original publisher: [Read original article](<https://vercel.com/changelog/claude-fable-5-access-restored-on-ai-gateway>)

Author: Jerilyn Zheng

Published: 2026-07-01T07:01:00Z

Content type: release

Language: en

Sources: [Vercel News](<https://devfeed.tech/sources/vercel-news.md>)

Topics: [Fable](<https://devfeed.tech/topics/fable.md>), [Anthropic Claude](<https://devfeed.tech/topics/anthropic-claude.md>), [API](<https://devfeed.tech/topics/api.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [debugging](<https://devfeed.tech/topics/debugging.md>)

Tags: [anthropic-claude](<https://devfeed.tech/tags/anthropic-claude.md>), [api](<https://devfeed.tech/tags/api.md>), [coding](<https://devfeed.tech/tags/coding.md>), [debugging](<https://devfeed.tech/tags/debugging.md>), [docs](<https://devfeed.tech/tags/docs.md>), [fable](<https://devfeed.tech/tags/fable.md>), [government](<https://devfeed.tech/tags/government.md>), [model](<https://devfeed.tech/tags/model.md>), [models](<https://devfeed.tech/tags/models.md>), [real-time](<https://devfeed.tech/tags/real-time.md>), [retention](<https://devfeed.tech/tags/retention.md>), [safety](<https://devfeed.tech/tags/safety.md>)

## AI overview

Access to the Claude Fable 5 Mythos-class model has been restored on AI Gateway after the US Government lifted export controls. The release updates its safety classifiers and documents model fallbacks, API usage, and 30-day retention of prompts and completions.

## Source excerpt

Access to Claude Fable 5, the Mythos-class model, has now been restored on AI Gateway following the US Government's decision to lift the export controls. Fable 5 is the same model that was available between June 9 and June 12. What has changed is the safety classifiers, which are now updated and more robust. In the near term, some routine tasks such as coding and debugging may trigger safety classifiers. To ensure requests are still serviced when the safety classifiers are triggered, use model fallbacks. AI Gateway will try each model in models in the stated order if Anthropic refuses the request to Fable 5. To call Fable 5, use model name anthropic/claude-fable-5: Model fallbacks work on every API format: for more information on how to configure these, see the docs. Anthropic does not support Zero Data Retention for the model, because some misuse patterns are only visible across cumulative requests, which real-time filters cannot catch on their own. Prompts and completions are retained for 30 days and are not used to train Claude. Read more in the data retention whitepaper. Read more