Anthropic removed model-card guidance for Claude Fable 5 and Claude Mythos 5.

Do not treat prior Fable 5, Mythos 5 availability, routing, or pricing language as current.

The removed text had positioned Fable 5 as generally available and Mythos 5 as limited availability via Project Glasswing.

• Aug 15, 2026OpenAI made studying, project memory, and moving between typing, dictation, and desktop work easier.
• Aug 15, 2026Think is selectable on the web for Free and Go users.
• Aug 15, 2026ChatGPT and Codex desktop app is in public preview on Linux with browser actions.

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