Tencent Hy3 released: matches much larger flagship models with 2-5x fewer parameters

腾讯混元正式发布Hy3模型

Tencent officially released Hy3 under Apache 2.0. With 1/5 to 1/2 the parameters of competing flagship models, Hy3 matches or beats them on reasoning, agent, and long-context benchmarks. In a 270-person internal blind test, Hy3 scored 2.67/4 vs GLM5.1's 2.51/4. Hallucination rate dropped from 12.5% to 5.4%, multi-turn error rate from 17.4% to 7.9%. WorkBuddy task completion jumped from 72% to 90%, with 34% less time. API pricing: ¥1/M input tokens, ¥4/M output, ¥0.25 cached. The post does not disclose exact parameter count or training details.

Why it matters: Tencent Hunyuan releases Hy3, open-source under Apache 2.0, with parameter counts 1/5 to 1/2 of competitors yet matching or beating them on reasoning, agent, and long-context benchmarks. A 270-person blind test shows it beating GLM5.1. Domestic flagship open-source release is ...