Anthropic Claude Fable 5.2 is launched on B.AI, with upgraded long context and Agent capabilities

On November 10, the B.AI platform announced the official launch of Anthropic Claude Fable 5.2, with API and Web Chat available simultaneously. This model is designed for complex reasoning, software engineering, and long-cycle agent workflows, always enabling adaptive thinking, equipped with a 1M Token ultra-large context window and a maximum output of 128K Tokens.

According to the Artificial Analysis Intelligence Index v5 rating, Claude Fable 5.2 topped the list with a score of 65 under the highest configuration, far exceeding the median score of 40 among similar models. The generation speed has improved by up to 30% compared to Fable 5.1, with a standard price of $8.00 per million input Tokens and $40.00 per million output Tokens, and it supports prompt caching. You are welcome to log in to chat.b.ai/chat to experience it.