B.AI has announced that API route calls now constitute 90.6% of its total usage, with paid users comprising 95.1% as of May 8. This highlights the platform's appeal to developers and high-frequency production users. The Claude series remains the most popular model, accounting for 35.6% of call share, favored for complex reasoning and long-context tasks. Meanwhile, DeepSeek-V4-Flash and GPT-5.5 are gaining traction in high-concurrency, low-latency applications. The surge in API calls underscores the rapid expansion of B.AI's application-layer ecosystem, positioning it as a pivotal infrastructure for AI development.