Tencent Hunyuan Hy4 officially launched on B.AI, with API and Web Chat opening simultaneously and enjoying a 50% discount

B.AI announced that Tencent's Hunyuan has officially launched a new language model, Hy4, designed for multi-step agent workflows and long-term productivity tasks, with API and Web Chat available simultaneously.

Hy4 introduces visual understanding capabilities for the first time, supporting both text and image inputs, and features a 1M Token ultra-long context window, covering software development, document and chart analysis, and complex office agent tasks, demonstrating 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 balances context length and visual understanding; B.AI is also launching an official 50% discount, with the promotion running until December 31, 2026, 23:59:59 (SGT), further reducing the cost threshold for high-frequency calls and large-scale agent deployments.