Tencent has released Hy3-preview, an open weights reasoning model scoring 42 on the Artificial Analysis Intelligence Index, trailing recent open weights peers

Hy3-preview is the latest model from @TencentHunyuan. It is a 295B total / 21B active parameter Mixture-of-Experts model, smaller than its December 2025 predecessor Tencent HY 2.0 (406B total / 32B active). Recent leading open weights reasoning models include Qwen3.6 27B (Reasoning, 46), DeepSeek V4 Flash (Reasoning, Max Effort, 47, 284B / 13B) and GLM-5.1 (Reasoning, 51, 744B / 40B). The Intelligence Index is the Artificial Analysis synthesis metric incorporating 10 evaluations covering agentic tasks, coding and scientific reasoning.

Key takeaways:
➤ Hy3-preview trails recent open weights peers on GDPval-AA. Hy3-preview scores an Elo of 1235 on GDPval-AA, our agentic real-world work tasks benchmark, behind Qwen3.6 27B (Reasoning, 1414), DeepSeek V4 Flash (Reasoning, Max Effort, 1388) and GLM-5.1 (Reasoning, 1535). GDPval-AA tests models on real-world tasks across 44 occupations and 9 major industries.
➤ Hy3-preview ties GLM-5.1 (Reasoning) on CritPt despite scoring nearly 10 Intelligence Index points lower. Hy3-preview scores 4.6% on CritPt (research-level physics), matching GLM-5.1 (Reasoning, 51 on the Intelligence Index) and ahead of Qwen3.6 27B (Reasoning, 1.1%) but behind DeepSeek V4 Flash (Reasoning, Max Effort, 7.1%). It trails the open weights leaders, including DeepSeek V4 Pro (Reasoning, Max Effort, 12.9%) and Kimi K2.6 (8.0%).
➤ Hy3-preview used ~125M output tokens to run the Intelligence Index. This is ~12% more than GLM-5.1 (Reasoning, 112M) and less than Qwen3.6 27B (Reasoning, 144M) and DeepSeek V4 Flash (Reasoning, Max Effort, 241M).
➤ AA-Omniscience is a relative weakness compared to peers. Hy3-preview scores -35 on the Artificial Analysis Omniscience Index with 28% accuracy and an 87% hallucination rate. This trails DeepSeek V4 Flash (Reasoning, Max Effort, -23), Qwen3.6 27B (Reasoning, -20) and GLM-5.1 (Reasoning, 2).

Other information:
➤ Size: 295B total parameters, 21B active parameters
➤ Context window: 256K tokens
➤ License: Tencent HY Community License Agreement, with restricted commercial use
➤ Availability: Weights are available on @huggingface Face and the model is also available on @SiliconFlowAI at $0/$0 per 1M input/output tokens