Tencent HunyuanLaunchAI ModelsAugust 28, 2026

Tencent open-sources Hy4 preview, a 770B MoE with 1M-token context

Hy4 preview has 770B total parameters, 49B active, and a context window exceeding 1M tokens, up from Hy3's 295B/21B and 256K context in July. It scored 2.99/4.00 in Tencent's blind eval of 163 experts across 203 engineering tasks, ahead of GLM-5.3 (2.92) and Kimi K3 (2.94).

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