Tencent open-sources Hunyuan Hy4 preview (770B MoE, 1M+ context)
Tencent's Hunyuan team released and open-sourced the Hy4 preview on 2026-08-28: a 770B-parameter MoE with 49B active parameters and a context window over 1M tokens, its third major model in six months after the Hy3 preview (April) and Hy3 (July).
Key facts
- Hy4 preview: 770B total / 49B active parameters, context >1M tokens (Pandaily)
- Hy3 preview (2026-04-23): 295B total / 21B active, 256K context, open-sourced
- Hy3 full release July 2026 under Apache 2.0 (secondary source)
What happened
Tencent open-sourced a preview of its next-generation LLM Hy4 on 2026-08-28, reporting strong coding, office-productivity and scientific-research performance and ranking among top open models. Details come from press coverage; the full technical report was not reviewed for this entry.
Why it matters
Tencent joins DeepSeek, Moonshot, Alibaba and Zhipu in shipping ~1T-class open-weights models, deepening the Chinese open-model ecosystem.
Changelog
- 2026-09-29: created
Related events
Sources (3)
- pressPandaily: Tencent Hunyuan releases Hy4 preview
- pressFutu: Hunyuan Hy3 preview released and open-sourced
- discussionmetir: Tencent's Hunyuan Hy4 and China's open-model race
id: 2026-08-28-tencent-hunyuan-hy4-preview · updated 2026-09-29 · open in the interactive timeline