Vercel added Tencent's Hy4 Preview to AI Gateway, giving developers a hosted route to the model through the gateway's existing interface. The announcement describes Hy4 Preview as an open-source model aimed at long-horizon coding, document analysis, game development and scientific reasoning. It specifies tencent/hy4-preview as the model identifier and describes connecting coding agents to that route. For teams already using the gateway, this makes Hy4 available through model selection while retaining the gateway's usage tracking and budget controls, so it can be evaluated alongside other available models.
Terms in this piece · Glossary
token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
