Anthropic’s Claude Fable is a version of Mythos the public can access today

Anthropic has launched Claude Fable 5, the first public-facing iteration of its advanced Mythos model, which excels in software engineering and complex reasoning. To prioritize security, the model includes strict safety limits in sensitive fields like cybersecurity and biology, defaulting to Claude Opus 4.8 when necessary. Access is currently available via the Claude API and enterprise plans, with Anthropic mandating a 30-day data retention policy to monitor for potential security threats. Despite higher costs compared to previous models, early corporate adopters report superior performance in autonomous operations and complex analytical tasks.

(Source：TechCrunch)