Hy4 Preview now available on AI Gateway

Tencent's Hy4 Preview, an open-source Mixture-of-Experts model with 770B total parameters and 49B active per token, is now available on Vercel's AI Gateway, supporting a 1M-token context window for long-horizon coding, document analysis, game development, and scientific reasoning. The integration allows developers to use the model via the AI SDK or coding agents like Claude Code, Codex, OpenCode, Cursor, and Pi, with AI Gateway offering unified API access, usage tracking, and no markup on inference.

Hy4 Preview from Tencent https://vercel.com/ai-gateway/models/hy4-preview is now available on AI Gateway. Hy4 Preview is an open-source Mixture-of-Experts model with 770B total parameters and 49B active per token, aimed at long-horizon coding, document analysis, game development, and scientific reasoning. It serves a context window of 1M tokens. To use Hy4 Preview, set model to tencent/hy4-preview in the AI SDK https://ai-sdk.dev/ : To use it in a coding agent, see the coding agents guide https://vercel.com/docs/ai-gateway/coding-agents , then run vercel ai-gateway coding-agents setup to connect agents like Claude Code, Codex, OpenCode, Cursor, Pi, and more and select tencent/hy4-preview inside the agent. Try Hy4 Preview in the model playground https://vercel.com/ai-gateway/models/hy4-preview . AI Gateway provides a unified API for calling models, tracking usage and cost, and configuring retries, failover, and performance optimizations for higher-than-provider uptime. It includes built-in custom reporting https://vercel.com/changelog/custom-reporting-ai-gateway , Zero Data Retention support https://vercel.com/blog/zdr-on-ai-gateway , budgets for API keys https://vercel.com/docs/ai-gateway/authentication-and-byok/api-keys , routing rules https://vercel.com/docs/ai-gateway/models-and-providers/routing-rules , and more. AI Gateway reflects provider pricing with no markup and does not charge a platform fee on inference, including on Bring Your Own Key https://vercel.com/docs/ai-gateway/authentication-and-byok/byok BYOK requests. You can view all language models https://vercel.com/ai-gateway/models?type=text available on AI Gateway.