Anthropic launches Claude Fable 5, the first publicly available Mythos-class model

Anthropic unveiled Claude Fable 5 today, marking the inaugural public release of a Mythos-class model. The company highlights it as the first model in its Claude lineup trusted to handle complete projects autonomously. The model's capabilities were demonstrated through the development of a self-maintaining, proactive media tracking system built over two days, with Fable handling substantial portions of the implementation. This project showcases the model's practical performance in real-world development scenarios.