The short answer (July 2026): Claude Fable 5 is Anthropic's most capable generally available model, released June 9, 2026 as the first of a new "Mythos-class" tier that sits above the Opus line. It costs $10 per million input tokens and $50 per million output tokens on the API (model ID claude-fable-5), ships with a 1 million token context window, and is available on Claude Pro, Max, Team, and Enterprise plans and in Claude Code. It launched, was suspended under US export controls on June 12 after a safeguard bypass was discovered, and was restored globally on July 1. Yes, it is available right now. Last verified: July 10, 2026, against Anthropic's announcement, model docs, and pricing pages. What Fable 5 actually is Anthropic released two models on June 9 with one underlying brain. In the company's announcement, Claude Fable 5 is "a Mythos-class model made safe for general use," and Claude Mythos 5 is "the same underlying model as Fable 5, but with the safeguards lifted in some areas." Mythos-class means "a tier of Claude models that sit above our Opus class in capability." Both succeed the Claude Mythos Preview that Anthropic showed in April 2026. The practical translation: Fable 5 is the one you can use. Mythos 5 is invitation-only, restricted to approved organizations in Anthropic's Project Glasswing defensive-cybersecurity program, with no self-serve signup. On capability, Anthropic claims "state-of-the-art on nearly all tested benchmarks," with standout results in software engineering, knowledge work, vision, and scientific research, including the top score on Cognition's FrontierCode evaluation. Those are the vendor's own numbers; treat them as a strong signal, not gospel. The credible third-party endorsement in the launch material is Stripe's, saying Fable 5 "compressed months of engineering into days." The June suspension, explained You may have found this page because