Anthropic Claude Fable 5.2 Now Live on B.AI, with Further Upgrades to Long-Context and Agent Capabilities

TechFlow reported that on November 10, the B.AI platform announced the official launch of Anthropic Claude Fable 5.2, with both API and Web Chat endpoints available simultaneously. The model is designed for complex reasoning, software engineering, and long-horizon agent workflows. Adaptive thinking is always enabled, and it features a 1M-token ultra-large context window and up to 128K output tokens. According to the Artificial Analysis Intelligence Index v5, Claude Fable 5.2 tops the leaderboard with a score of 65 at its highest configuration, far above the median score of 40 among comparable models. The model also balances performance and cost: generation speed is up to 30% faster than Fable 5.1, standard pricing is $8.00 per million input tokens and $40.00 per million output tokens, and it supports prompt caching to meet both high-intensity reasoning and high-frequency call requirements. Sign in at chat.b.ai/chat to try it now.

Source: TechFlow