Claude has released upgraded models, Fable 5.2 and Mythos 5.2, designed to tackle complex technical challenges, showing improvements in coding, reasoning, and vision. These models have demonstrated impressive capabilities in prerelease testing, including completing software migrations, designing electronic devices, solving physics problems, and making progress on robotics evaluations. While Fable 5.2 is available to all users with strong cybersecurity and biology safeguards, Mythos 5.2 is accessible to organizations pursuing beneficial applications in cybersecurity or biomedical research through specialized programs, highlighting Claude's commitment to safety and responsible innovation.