Hy3 vs Hy4 preview: Specs & Benchmark Comparison
Hy3 and Hy4 preview both come from Tencent, Hy3 was released in July 2026, and Hy4 preview followed a month later in August 2026. Hy4 preview is the larger model at roughly 770 billion parameters, against 295 billion for Hy3.
The two models share 17 published benchmarks. Hy4 preview leads on 16 of them, Hy3 on 1. The widest gaps are on DeepSWE, where Hy4 preview scores 64.3% against 28.0%; MathArena Apex, where Hy4 preview scores 74.2% against 38.7%. Averaged across everything we track, Hy3 sits at 57.1% and Hy4 preview at 58.7%.
| Characteristic | Hy3 | Hy4 preview |
|---|---|---|
| Company | Tencent | Tencent |
| Release Date | July 6, 2026 | August 28, 2026 |
| Parameters | 295B | 770B |
| Multimodal | No | No |
| Average Score | 57.1% | 58.7% |
| Benchmarks | ||
| DeepSWE | 28.0% | 64.3% |
| MathArena Apex | 38.7% | 74.2% |
| Toolathlon | 48.5% | 74.1% |
| ArXivMath | 52.2% | 66.6% |
| Terminal-Bench 2.1 | 71.7% | 85.4% |
| NL2Repo | 45.6% | 58.9% |
| APEX-Agents | 25.6% | 37.1% |
| SuperChem | 54.9% | 66.4% |
| SWE-Bench Pro | 57.9% | 65.7% |
| SkillsBench | 55.3% | 62.9% |
| WideSearch | 76.4% | 83.9% |
| SWE-bench Multilingual | 75.8% | 82.9% |
| MCP Atlas | 79.1% | 83.7% |
| Humanity's Last Exam (no tools, text-only) | 47.0% | 43.4% |
| Humanity's Last Exam (with tools, text-only) | 53.2% | 55.4% |
| GPQA | 90.4% | 92.3% |
| HorizonMath | 7.1% | 8.8% |
Visual Benchmark Comparison
Verdict
Hy4 preview leads in 1 out of 2 comparison categories.
Both models show comparable average scores: Hy3 — 0.6, Hy4 preview — 0.6.
Hy4 preview is newer: released 8/28/2026 vs 7/6/2026.
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Frequently Asked Questions
Which is better for coding — Hy3 or Hy4 preview?
Which model is cheaper — Hy3 or Hy4 preview?
Which has a larger context window — Hy3 or Hy4 preview?
The Hy3 and Hy4 preview comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Hy3 or Hy4 preview page. See also the complete list of AI model comparisons.