B.AI API Platform Launches Claude Opus 5 With 1 Million-Token Context Window

B.AI API platform has officially launched the Claude Opus 5 model. According to ChainCatcher, the model offers a context window of up to 1 million tokens and a single-output limit of 128,000 tokens, with the platform saying it is designed for complex reasoning, long-code development, large-scale document analysis, and knowledge-intensive workflows. The release also adds a dual-channel API access option on the B.AI platform. In addition to the standard official interface, the new designated service provider channel allows enterprise users to receive cost discounts of up to 40%, while balancing performance and budget based on business needs.