Tencent open-sources Hy4 preview: 770B params, 49B active, 1M context under Apache 2.0
TencentHunyuan · x · 2026-08-29
Tencent Hunyuan released Hy4 preview: 770B total parameters with only 49B active per token, 1M context window, Apache 2.0 licensed. In the company's own blind eval — 163 experts scoring 203 tasks — it ranked ahead of GLM 5.3 and Kimi K3 on engineering work, scoring 65.7 on SWE bench Pro.
It's already available in Codex's model picker alongside sol 5.6, and OpenCode / Command Code serve it on the $10 plan with no API key or per-token metering. Weights and code are on HuggingFace and GitHub.
Related event: Tencent Open-Sources Hunyuan Hy4 Preview: 770B MoE with 1M Context(28 posts)→
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