#modèle de fondation

Economy & Market September 1, 2026 Auto-verified translation

Claude Fable 5.1 and Mythos 5.1

Product communication from **Anthropic** published on **September 1, 2026** on anthropic.com (~4,000 words, six sections, 22 testimonials from early-access partners). It announces **Claude Fable 5.1** (general availability) and **Claude Mythos 5.1** (verified access): *the same model, but with different levels of safeguards*.

#Claude Fable 5.1#Claude Mythos 5.1#foundation model

Anthropic — communication produit publiée sur anthropic.com · sans signature individuelle.

Economy & Market June 9, 2026 Auto-verified translation

Claude Fable 5 and Claude Mythos 5

Anthropic launches Claude Fable 5 (a Mythos-class model made safe for general use) and Claude Mythos 5 (the same model, with guardrails lifted, restricted to cyberdefenders via Project Glasswing): state-of-the-art performance in software engineering, vision, long-context memory, and life sciences.

#Claude Fable 5#Claude Mythos 5#foundation model

Anthropic