Anthropic launches Fable 5.2 and Mythos 5.2 AI models ahead of IPO

Anthropic released new versions of its Fable and Mythos AI models on Monday, ahead of its initial public offering later this month. Fable 5.2 can handle complex software development, control robots, and coordinate over 1,000 AI agents simultaneously. Mythos 5.2, with fewer safety restrictions for cybersecurity and bioscience applications, will be available to selected organizations through a verification program. Both models run faster than previous versions, and Fable 5.2 costs less than its predecessor. The US government restricted access to both models in June over safety concerns, but access was later restored after Anthropic added classification systems. The company is expanding Mythos access to US and international businesses, and CEO Dario Amodei urged AI firms in September to slow development of their most advanced models.