Anthropic first announced Mythos in April, which it called a "step change" in capabilities, but opted to tightly control its rollout through an initiative called Project Glasswing.

Anthropic is releasing a next-generation “Mythos-class” model to the general public with guardrails that remove dangerous capabilities related to areas such as cybersecurity and biological research. Called Claude Fable 5,

Claude Fable 5 is a version of Anthropic's Claude Mythos, an AI program which caused a stir among technology, finance, and government leaders

Anthropic PBC has said its new artificial intelligence tool, Mythos, is so good at finding vulnerabilities in software and computer systems that it can’t be released to the general public. The AI giant initially released Mythos to a small group of carefully chosen parties because if a tool this powerful fell into the wrong hands,

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

This version of Mythos excels at long, complex tasks, but passes on questions about risky things like cybersecurity or biology.

Mythos is Anthropic’s most capable model, which has not been made available to the public due to concerns that security firms may not be able to handle the threats it poses. A select number of companies have been given access to Claude Mythos Preview in a partnership called Project Glasswing.

Frontier AI labs are converging on a new strategy for controlling their most cyber-capable models while still commercializing them: selective access. Why it matters: OpenAI's trusted-access program and a pending program from Anthropic are creating a new power center in cybersecurity where AI companies help decide which defenders can use the most advanced cyber capabilities.