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4 posts about Claude Fable 5 from Simon Carter.
Anthropic's Mythos-class Claude Fable 5 model is now available in Vertex AI's Model Garden, billed through Google Cloud with no separate Anthropic API subscription needed.
Anthropic walked back a covert policy that quietly limited Claude Fable 5's usefulness for frontier LLM development tasks, without telling users.
Anthropic launches Claude Fable 5 with a 1M-token context window, $10/$50 pricing, and a safety-classifier fallback — plus a restricted Mythos 5 for Project Glasswing partners.
A Commerce Department directive citing national security concerns forced Anthropic to suspend all access to Claude Fable 5 and Mythos 5 globally.