Anthropics Fable 5.1 is a bit cheaper, a bit smarter, and refuses a lot less
Summary
Anthropic launched Fable 5.1 and Mythos 5.1, promising better performance at lower cost through cheaper cache reads. Fable 5.1 is generally available, while Mythos 5.1 stays in trusted access because Anthropic built it with additional safeguards for cybersecurity and life sciences use cases. The release also adds a private-preview watermark detection API for eligible organizations and new enterprise privacy controls through Enterprise Frontier Safeguards. Anthropic further reduced unnecessary safety interventions, improved cyber and biology handling, and added anti-distillation restrictions for new accounts.
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Developer and IT Infrastructure
Development Platforms
Linked Companies
Anthropic
$10M to $25M