Claude Fable 5
Anthropic's consumer frontier AI model released in June 2026 and suspended globally hours after launch under a US export-control directive barring foreign-national access.
Last refreshed: 13 June 2026 · Appears in 1 active topic
Why was Claude Fable 5 the first consumer AI model pulled on national-security grounds?
Timeline for Claude Fable 5
Disabled globally after Commerce directive; had been priced free in paid plans until 22 June
AI: Jobs, Power & Money: Washington pulls a live AI model- Why did the US government shut down Claude Fable 5?
- Commerce Secretary Howard Lutnick issued a directive on 12 June 2026 barring foreign nationals from accessing Claude Fable 5, citing national-security concerns about an alleged jailbreak that could route the model toward offensive cyber work. Anthropic disabled the model globally to comply.Source: Axios / Anthropic statement
- What is Claude Fable 5 and how is it different from Claude Mythos 5?
- Claude Fable 5 is Anthropic's consumer-facing Mythos-class model, designed for general use and priced at $10/M input tokens. Claude Mythos 5 is its frontier sibling, aimed at more advanced and restricted use cases. Both were suspended on 12 June 2026 under the same US export-control directive.Source: Anthropic
- How did Stripe use Claude Fable 5 to migrate 50 million lines of code?
- Stripe used Claude Fable 5 to complete a 50-million-line codebase migration in a single day, a task its own engineering team had estimated would take two months. The demonstration was cited as evidence of AI displacing substantial software-engineering labour.Source: Stripe / briefing reporting
- When will Claude Fable 5 be available again?
- Anthropic has not announced a restoration date. The 12 June 2026 suspension is in force until the Commerce Department revises or withdraws the directive. Anthropic publicly disagreed with the action and said it was working to restore access.Source: Anthropic statement
Background
Claude Fable 5 is Anthropic's Mythos-class consumer AI model, released on 9 June 2026 and suspended globally on 12 June after Commerce Secretary Howard Lutnick sent Anthropic chief executive Dario Amodei a directive barring all foreign nationals from accessing the model. To comply, Anthropic disabled Fable 5 for every customer worldwide. It was the first time a US government order had pulled a live consumer AI product on national-security grounds.
Fable 5 sits below the frontier Claude Mythos 5 in Anthropic's product line and was designed as the public-facing, SAFE-for-general-use member of the Mythos class. Anthropic had priced it free in paid plans until 22 June, with subsequent pricing at $10 per million input tokens and $50 per million output tokens. The model outperforms Opus on long autonomous tasks and routes cybersecurity, biological, and chemical queries to the higher-capability Mythos 4.8 sibling. Stripe used Fable 5 to complete a 50-million-line code migration in a single day, work its own engineering team had estimated at two months.
The trigger for the suspension was a rival company's claim of a jailbreak: asking Fable 5 to read a codebase and fix the vulnerabilities it found could be routed toward offensive cyber output. Anthropic publicly disputed the action, noting the same vector sits in OpenAI's GPT-5.5, which was not suspended. The political context is pointed: Anthropic had backed the pro-regulation Public First campaign, while OpenAI-aligned backers funded the anti-regulation Leading the Future PAC. The lab that lobbied for oversight was the one shut down first.
