Anthropic Debuts Claude Fable 5.2 and Mythos 5.2 for Technical Workflows

Anthropic has officially rolled out its latest AI models, Claude Fable 5.2 and Claude Mythos 5.2, aimed at streamlining complex technical operations. These iterations offer a 30% increase in output speed compared to the 5.1 version, with an optional fast mode that can further accelerate execution by up to 2.5 times. Pricing for the API is set at $8 per million input tokens and $40 per million output tokens.

The two models serve different user bases. Fable 5.2 is built for general users and includes enhanced safety protocols that reduce false-positive content blocks by 55%. Mythos 5.2 is reserved for verified enterprise partners working specifically within life sciences and cybersecurity. Both versions have shown significant performance gains over the previous Claude Opus 5.5 in autonomous coding and scientific research benchmarks.

During internal testing, the models demonstrated high-level problem-solving, including the formalization of Fermat’s Last Theorem and the design of functional printed circuit boards. Security remains a priority, with the company implementing new defenses that reduce unauthorized data distillation attempts by up to 99%. The models are now available globally via the Anthropic platform and major cloud providers like AWS, Google Cloud, and Microsoft Azure.