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

According to TechFlow, on November 4, B.AI announced the official launch of Hy4, a new language model from Tencent Hunyuan designed for multi-step Agent workflows and long-running productivity tasks. Both the API and Web Chat are now available. For the first time, Hy4 includes visual understanding capabilities, supports text and image inputs, and features an ultra-long context window of 1M tokens. It can cover software development, document and chart analysis, and complex office Agent tasks, delivering stable performance in long-chain reasoning and function-calling scenarios. For developers who need to continuously handle multi-step tasks, cross-document analysis, and office automation, Hy4 offers a new option that combines context length and visual understanding. B.AI has also launched an official 50% discount, valid until December 31, 2026, 23:59:59 (SGT), further lowering the cost barrier for high-frequency calls and large-scale Agent deployments. Sign in to chat.b.ai/chat to try it.

Source: TechFlow