Anthropic launches Claude Fable 5, a state-of-the-art AI model that beats OpenAI's GPT-5.5
… As you can notice in the benchmarks above, Fable 5 and Mythos 5 are state-of-the-art on most key AI benchmarks and they are well ahead of OpenAI's frontier model, GPT-5.5 . For example, Fable 5 is the new state-of-the-art model for vision tasks. …