Anthropic opens powerful Mythos AI model to public – with some safeguards

Anthropic is rolling out ⁠a public version of ⁠its Mythos AI model, but ⁠with guard rails barring its use in risky areas such as cybersecurity, after a preview earlier this year sent shock waves globally with its ability to find software flaws.

The new Claude Fable 5 is the most powerful model ‌Anthropic has ever made for wider use, the start-up said on Tuesday, touting its performance in software engineering and analytics.

Anthropic has so far limited its access to a group of about 200 organisations including the US government under the Glasswing programme, after announcing in April that Mythos had uncovered thousands of software vulnerabilities.

Offering ⁠its capabilities more widely may allow the US$965 billion company to extend the momentum that has ‌powered its valuation above rival OpenAI just as the two start-ups at the centre of the AI industry race to go public.

The ‌company said it had done extensive testing to ensure that users could not ⁠manipulate the new ⁠model to bypass its guidelines and perform restricted actions.

“Let’s say I’m a college student asking the model ‌like help me find cyber vulnerabilities on X package or code. The model would refuse and Fable 5 will ‌fall back ‌to Opus 4.8 for a response,” said Dianne Penn, Anthropic’s head of product management, research ‌and labs.