Hy4 preview

Tencent: Hy4 preview is a mixture-of-experts model from Tencent, with 49B active parameters out of 770B total. It is designed for coding agents, complex tool-use workflows, and productivity tasks that require planning, context continuity, and sustained multi-step execution.

ChatTencent1M tokens$0.9091 / $2.7262 · 1M

tencent/hy4-preview

Context
1M tokens
Completion cap
64,000
Tools
Yes
JSON
Yes
Released
2026-08-28

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "tencent/hy4-preview",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is Hy4 preview?
Tencent: Hy4 preview is a mixture-of-experts model from Tencent, with 49B active parameters out of 770B total. It is designed for coding agents, complex tool-use workflows, and productivity tasks that require planning, context continuity, and sustained multi-step execution. Hy4 preview runs on the Geek Hub API (OpenAI-compatible). Model id: tencent/hy4-preview.
Is Hy4 preview free?
No. Input is $0.9091 per 1M tokens and output is $2.7262 per 1M tokens on Geek Hub (markup included).
What is the context length of Hy4 preview?
Hy4 preview has a 1M tokens context window. It supports up to 64,000 completion tokens.
Does Hy4 preview support tool calling and structured outputs?
Hy4 preview accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was Hy4 preview released?
Hy4 preview was released on 2026-08-28.

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