NEWS

Anthropic releases its first Mythos-class model Claude Fable 

by | Jun 9, 2026

Anthropic just announced Claude Fable 5, a new AI model it said is the most powerful model it has ever made widely available.

According to the company, Fable 5 “shows exceptional performance in software engineering, knowledge work, and vision,” with its lead over other models growing as tasks become longer and more complex.

Fable 5 marks the first broad release from Anthropic’s Mythos class of AI models, after the company said the family was so capable at cybersecurity tasks that it was too dangerous to release publicly. Anthropic said the release was “made possible by new safeguards that block responses in specific high-risk areas,” with …

Read the full story at The Verge.

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