Anthropic split Fable 5 and Mythos 5 by cyber safeguards, giving vetted defenders stronger capabilities while limiting public misuse.

Anthropic said the new version, called Claude Fable 5, will have safeguards to prevent misuse in fields like cybersecurity.

Anthropic launched Claude Fable 5 on Tuesday, a Mythos-class model with safeguards blocking cybersecurity and biology queries, priced at $10 per million input tokens.

Anthropic has released a full version of its cybersecurity-centric Claude Mythos model—along with a safer version for the general public.

It says new safeguards make it possible to release a Mythos-class model it previously said was too risky to make public.

Anthropic is releasing Claude Fable 5, its first Mythos-class model available to the public. The model comes with guardrails that block responses in high-risk areas like…

Claude Fable 5 brings Mythos-class AI coding power to general users, but with cybersecurity guardrails, fallback models, and pricing that could make developers think twice.

Anthropic is releasing Claude Mythos 5 to trusted organizations and Claude Fable 5 to the public, a version it says can’t be used for cyberattacks.

Anthropic launches Claude Fable 5, a Mythos-class AI model engineered with new safeguards that specifically restrict its use in cybersecurity.

Anthropic is pricing both Fable 5 and Mythos 5 at $10 per million input tokens and $50 per million output tokens. The company says that is less than half the price of Claude…

Anthropic launched Claude Fable 5 with safeguards for high risk tasks while limiting Mythos 5 to trusted cyber partners.

Anthropic said it could not yet release the full Claude Mythos 5 model, so instead it created Fable 5 with baked in safeguards.

Anthropic ships two new models, Claude Fable 5 and Mythos 5, that claim to blow past the current Opus generation, especially in coding and research. Fable 5 finished a code…

‘Fable 5’ is the same system as controversial Mythos but comes with safeguards

Anthropic launched Claude Fable 5, its most capable consumer-facing AI model to date, but with a few guardrails.

Anthropic's most powerful model is now publicly available.

Positioned a tier above the previous Opus models, Claude Fable 5 sets a new benchmark for generally available AI, outperforming rivals like OpenAI's GPT-5.5.

Until today, Anthropic's Mythos-class models were restricted to a small group of cyberdefenders and...

This version comes with guardrails that block some of its most powerful capabilities

On June 9, 2026, Anthropic shipped the most capable model it has ever released to the public. The...

AI company restricted access to Fable 5, its most powerful Mythos model, for months over cybersecurity concerns