[Claude Fable 5.1 Officially Launches on B.AI API, Designed for High-Difficulty Reasoning and Agent Workflows] According to Deep Tide TechFlow, on September 3, the B.AI platform announced that Anthropic's latest Mythos-grade general model, Claude Fable 5.1, has officially been integrated into its API. This model shares the same underlying architecture as Claude Mythos 5.1 and is deeply optimized for high-intensity coding, long-term agent workflows, and complex knowledge tasks. In the CursorBench 3.2.0 test, it achieved an impressive performance score of 73.4% at the highest computational intensity. API integration is now open, and developers can enjoy exclusive discounts—up to 15% off through official channels and up to 40% off through selected service providers. B.AI continues to introduce world-class models, offering developers more powerful and cost-effective AI capabilities.