Technology
Claude Mythos 5: The Same Model, Minus the Guardrails
Claude Mythos 5 strips Fable 5's safety classifiers for vetted users only, forcing a fresh argument over who gets to use AI without a leash.
Jul 8, 2026
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3 stories for“anthropic trusted access program”
Technology
Anthropic Shipped the Same Model Twice Under Two Names, and the Difference Is Who Is Allowed to Use It
Fable 5.1 and Mythos 5.1 are the same model with different safeguards. One is generally available. The other is restricted to a set of American organisations through trusted access programmes, for work in cybersecurity and the life sciences.
Sep 1, 2026
Technology
Anthropic Launches Claude Fable 5, a New Tier Above Opus
Anthropic's Claude Fable 5 debuts a new Mythos class above Opus, pairing frontier capability with automatic safety routing for risky queries.
Jun 9, 2026
