Anthropic releases its first Mythos-class model Claude Fable 

Anthropic released Claude Fable 5, described as its most powerful publicly available AI model, which performs exceptionally well at software engineering, knowledge work, and vision tasks. This is the first broad public release from Anthropic's Mythos class of models, which the company previously considered too dangerous to release due to their advanced cybersecurity capabilities. The release became possible through new safeguards that prevent the model from responding to requests in high-risk areas.