Tencent Hy4 preview | Epoch AI

ECI

N/A

Tencent

Aug. 28, 2026

Open weights

Tencent Hy4 preview is an open-weights model from Tencent, released August 28, 2026.

Tencent Hy4 preview vs select alternatives

Domain	Benchmark	Tencent Hy4 preview Tencent Aug. 28, 2026 Open weights	Claude Opus 5 Anthropic Jul. 24, 2026 Closed weights	GPT-5.5 Pro OpenAI Apr. 23, 2026 Closed weights	Kimi K3 Moonshot Jul. 16, 2026 Open weights
Mathematics	ProofBenchBest score 100%	75%	99%	n/a	87%

Model metadata

General
Organization	Tencent
Release date	Aug. 28, 2026
Model accessibility	Open weights
Country	China
Knowledge cutoff	Unknown
Provider notes	hy.tencent.com

Pricing
Input price	$0.834 / 1M tokens
Output price	$2.501 / 1M tokens

Training
Parameters	7.7e11
Training compute	Unknown
Training hardware	Unknown
Training time	Unknown
Training dataset size	Unknown