Anthropic has released Claude Fable 5, the first publicly available model in its Mythos class and the company’s most capable AI system to date. The model includes enhanced safeguards designed to restrict high-risk cybersecurity and biological-use cases, areas that previously limited broader access to Mythos technology. Fable 5 is priced at roughly double the cost of Claude Opus 4.8 and follows months of speculation surrounding the Mythos project. The launch signals Anthropic’s push to compete at the forefront of advanced AI development while balancing performance with stricter safety controls.








