📝 TL;DR 📝 Anthropic has launched Claude Fable 5, its most powerful model ever made publicly available, along with Claude Mythos 5 for a restricted group of cybersecurity and research partners. For solopreneurs and small business owners using AI daily, Fable 5 represents a meaningful step up in what the tools you already rely on can actually do. 🧠 Overview 🧠 On June 9, 2026, Anthropic announced two new models: Claude Fable 5 and Claude Mythos 5. Fable 5 is the headline release for general users and sits at the top of what is publicly accessible. Mythos 5 is the same underlying model but with safety restrictions partially lifted, reserved for a small group of vetted cybersecurity and biomedical research partners through Anthropic's Project Glasswing program. The reason these are two separate products rather than one comes down to risk management. Mythos-class models are powerful enough that unrestricted access creates real concerns around misuse in areas like cybersecurity. Fable 5 is the version with guardrails tuned conservatively for general use. Anthropic is transparent that this means some legitimate requests may occasionally fall back to an older model, though they report this happens in fewer than 5% of sessions. 📜 The Announcement 📜 Fable 5 is described as leading or near-leading on almost every major AI capability benchmark tested. Both models are priced at $10 per million input tokens and $50 per million output tokens, which Anthropic notes is less than half the price of the previous Mythos Preview model. Fable 5 is available on all plans today through June 22 at no additional cost. After June 23, Pro, Max, Team, and Enterprise subscription users will need usage credits to access it, with the intention to restore it to standard plans once capacity allows. Mythos 5 is currently restricted to existing Project Glasswing cybersecurity partners, with a planned expansion to a broader trusted access program for both cybersecurity and biomedical research organizations.