Tencent LLM Big Open weights

Hy4 preview

77 days since Tencent announced it · 28 Aug 2026

Hy4 preview is an open-weights LLM from Tencent, announced 28 Aug 2026. It costs $0.83 per 1M input tokens and $2.50 per 1M output tokens. Its context window is 1M tokens. It has 770B parameters.

Input: $0.83; per 1M tokens
Cache write: —; per 1M tokens
Cache read: $0.04; per 1M tokens
Output: $2.50; per 1M tokens
Context window: 1M; tokens
Parameters: 770B; total

Announcement: tencent.com/tencent-releases-and-open-sources-tencent-hy4-preview
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Tencent open-sources 770B-parameter Hy4 preview
28 Aug 2026

Tencent · Big · Hy

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Tencent open-sources 770B-parameter Hy4 preview