Anthropic releases Fable 5.2 and restricted-access Mythos 5.2

Anthropic has released Claude Fable 5.2 and Claude Mythos 5.2 at $8 per million input tokens and $40 per million output tokens. The company says they generate output up to 30% faster than their 5.1 predecessors and improve coding, reasoning and vision performance. The models share an underlying model but differ in access and safeguards. Fable is available to all users, while organizations pursuing cybersecurity or biomedical research can apply for Mythos through verification programs. An optional fast mode costs $16 per million input tokens and $80 per million output tokens, with token generation up to 2.5 times faster. Fable's safeguards block high-risk cybersecurity activities and most research biology tasks; blocked queries instead receive responses from older models.