Tencent Hunyuan Hy4 Officially Launches on B.AI, API and Web Chat Now Available with 50% Off

on November 4, B.AI announced that Hy4, a new language model developed by Tencent Hunyuan for multi-step Agent workflows and long-duration productivity tasks, has officially launched, with simultaneous open access to both API and Web Chat platforms. Hy4 introduces visual understanding capabilities for the first time, supports text and image inputs, and features an ultra-long 1M token context window. It can cover software development, document and chart analysis, and complex office Agent tasks, demonstrating stable performance in long-chain reasoning and function calling scenarios. For developers needing to continuously handle multi-step tasks, cross-document analysis, and office automation, Hy4 provides a new option that balances context length and visual understanding; B.AI is simultaneously rolling out an official 50% discount, valid until December 31, 2026, at 23:59:59 (SGT), further lowering the cost threshold for high-frequency calls and large-scale Agent deployments. You are welcome to visit chat.b.ai/chat to experience it.