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Tencent Hy4 preview announcement artwork with the Hy4 model name
AI Research
headsetAudio28 Aug 2026

Tencent releases Hy4 preview with 770B parameters and 1M context

Tencent has released and open-sourced Hy4 preview, a 770-billion-parameter mixture-of-experts model with 49 billion active parameters and a context window above one million tokens. AIMI saw it reach OpenRouter and OpenCode Go later the same day.

smart_toyTencent1M ctx
IN:descriptionText+visibilityVision
OUT:chatText
visionimage understanding$0.8/M
5 min read4 takeawaysReadarrow_forward