Model comparison
GPT-5.2 Pro vs Hy4 preview
GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 45.3 on the Noometry Index. Hy4 preview costs 46× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Last verified . 1 shared benchmarks.
TencentSummary
- They share 1 benchmark with published results for both. GPT-5.2 Pro scores higher in 2 categories and Hy4 preview in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.2 Pro leads 51.5 to 31.9.
- The biggest single-benchmark swing is NYT Connections (extended): 79.3% for GPT-5.2 Pro and 68.2% for Hy4 preview.
- Hy4 preview is cheaper at $0.83 / $2.50 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
- Hy4 preview accepts more context: 1.05M tokens versus 400K.
- Hy4 preview has downloadable open weights; the other is API-only.
Side by side
| GPT-5.2 Pro | Hy4 preview | |
|---|---|---|
| Provider | OpenAI | Tencent |
| Noometry Index | 52.3 | 45.3 |
| Released | 2025-12-11 | 2026-08-28 |
| Weights | Proprietary | Open |
| Context window | 400K | 1.05M |
| Max output | 128K | 64K |
| Input $ / M tokens | $21 | $0.83 |
| Output $ / M tokens | $168 | $2.50 |
| Results tracked | 8 | 3 |
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Category by category
Coding Not comparable
GPT-5.2 Pro: —, Hy4 preview: 51.6 (#38)
| Benchmark | GPT-5.2 Pro | Hy4 preview |
|---|---|---|
| LMArena WebDev | — | 1632 |
Reasoning GPT-5.2 Pro leads
GPT-5.2 Pro: 51.5 (#33), Hy4 preview: 31.9 (#79)
| Benchmark | GPT-5.2 Pro | Hy4 preview |
|---|---|---|
| NYT Connections (extended) | 79.3% | 68.2% |
| ARC-AGI-2 | 54.2% | — |
| SimpleBench | 57.4% | — |
| ARC-AGI-1 | 90.5% | — |
| Epoch Capabilities Index | 155.4 | — |
Math GPT-5.2 Pro leads
GPT-5.2 Pro: 65.3 (#29), Hy4 preview: 55.7 (#42)
| Benchmark | GPT-5.2 Pro | Hy4 preview |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | — |
| FrontierMath Tier 4 | 46% | — |
| ProofBench | — | 75% |
| FrontierMath Tier 4 (v1) | 31.3% | — |
Frequently asked questions
Is GPT-5.2 Pro better than Hy4 preview?
GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 45.3 on the Noometry Index. Hy4 preview costs 46× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.2 Pro or Hy4 preview?
Hy4 preview is cheaper. It lists at $0.83 per million input tokens and $2.50 per million output tokens; GPT-5.2 Pro lists at $21 and $168.
Which has the bigger context window?
Hy4 preview does, with 1.05M tokens against 400K.
How many benchmarks do GPT-5.2 Pro and Hy4 preview share?
1 benchmark has published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Hy4 preview has 3.