Fable 5

Claude Fable 5 is Anthropic's flagship large language model and the company's most advanced AI system to date. As one of the leading large language models available in the commercial AI market, Fable 5 is capable of handling a broad range of complex tasks including reasoning, software development, research analysis, and creative applications.

The model has undergone refinements to improve its real-world usability and safety performance, including adjustments to its safety guidelines designed to reduce false refusals on legitimate requests. Fable 5 is available globally and serves as Anthropic's premium offering for consumers and enterprises seeking advanced AI capabilities. The company has also released more cost-efficient alternatives, such as Claude Opus 5, which aim to provide capabilities approaching Fable 5's performance at significantly lower operational cost.