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Hy3 preview

Tencent · 2026-04-23 · 298.8B parameters

Hy3 preview is Tencent Hy Team's April 2026 preview release of its sparse mixture-of-experts language model, comprising an approximately 295B-parameter backbone and a 3.8B-parameter multi-token-prediction layer, with about 21B active parameters and a 256K-token context length. It supports direct and reasoning modes and was the predecessor to the July 2026 Hy3 release.

Benchmark scores

BenchmarkScore
AA-LCR54.7
AA-LCR v1.164.7
AA-Omniscience Index-35.0
Artificial Analysis Omniscience Accuracy27.9
Artificial Analysis Omniscience Hallucination Rate75.7
Artificial Analysis Openness Index33.3
Artificial Analysis Progress Index v1267
BullshitBench v2 Leaderboard16.0
BuseyBench SVG2.1
Buyout Game Bradley-Terry Rating1621
CadQueryEval52.0
CadQueryEval — Bounding Box52.0
CadQueryEval — Chamfer Distance52.0
CadQueryEval — Code Execution64.0
CadQueryEval — Component Count64.0
CadQueryEval — Hausdorff 95p52.0
CadQueryEval — STL Creation64.0
CadQueryEval — Volume56.0
CadQueryEval — Watertight Mesh60.0
CadQueryEval (Corrected Geometry)52.0
CadQueryEval Corrected Geometry Bounding Box52.0
CadQueryEval Corrected Geometry Chamfer52.0
CadQueryEval Corrected Geometry Code Execution64.0
CadQueryEval Corrected Geometry Components64.0
CadQueryEval Corrected Geometry Hausdorff52.0
CadQueryEval Corrected Geometry STL Creation64.0
CadQueryEval Corrected Geometry Volume56.0
CadQueryEval Corrected Geometry Watertightness60.0
Capability149.4
CL-bench (Overall)22.8
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