Model comparison
Hy4 preview vs o3-pro
Hy4 preview is the stronger model overall, scoring 45.3 to 42.9 on the Noometry Index.
Last verified . 0 shared benchmarks.
TencentSummary
- The widest gap is in reasoning, where Hy4 preview leads 31.9 to 23.8.
- Hy4 preview is cheaper at $0.83 / $2.50 per million input/output tokens, against $20 / $80 for o3-pro.
- Hy4 preview accepts more context: 1.05M tokens versus 200K.
- Hy4 preview has downloadable open weights; the other is API-only.
Side by side
| Hy4 preview | o3-pro | |
|---|---|---|
| Provider | Tencent | OpenAI |
| Noometry Index | 45.3 | 42.9 |
| Released | 2026-08-28 | 2025-06-10 |
| Weights | Open | Proprietary |
| Context window | 1.05M | 200K |
| Max output | 64K | 100K |
| Input $ / M tokens | $0.83 | $20 |
| Output $ / M tokens | $2.50 | $80 |
| Results tracked | 3 | 12 |
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Category by category
Coding o3-pro leads
Hy4 preview: 51.6 (#38), o3-pro: 55.5 (#24)
| Benchmark | Hy4 preview | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| LMArena WebDev | 1632 | — |
| WeirdML | — | 58.2% |
Reasoning Hy4 preview leads
Hy4 preview: 31.9 (#79), o3-pro: 23.8 (#171)
| Benchmark | Hy4 preview | o3-pro |
|---|---|---|
| ARC-AGI-2 | — | 4.9% |
| Kagi LLM Benchmark | — | 72.1% |
| NYT Connections (extended) | 68.2% | — |
| ARC-AGI-1 | — | 59.3% |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |
| Epoch Capabilities Index | — | 147.42 |
Math Not comparable
Hy4 preview: 55.7 (#42), o3-pro: —
| Benchmark | Hy4 preview | o3-pro |
|---|---|---|
| ProofBench | 75% | — |
Knowledge Not comparable
Hy4 preview: —, o3-pro: 29.5 (#238)
| Benchmark | Hy4 preview | o3-pro |
|---|---|---|
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |
Long Context Not comparable
Hy4 preview: —, o3-pro: 72.2 (#1)
| Benchmark | Hy4 preview | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
Writing & Preference Not comparable
Hy4 preview: —, o3-pro: 57.1 (#133)
| Benchmark | Hy4 preview | o3-pro |
|---|---|---|
| Short-Story Creative Writing | — | 84.4% |
Frequently asked questions
Is Hy4 preview better than o3-pro?
Hy4 preview is the stronger model overall, scoring 45.3 to 42.9 on the Noometry Index.
Which is cheaper, Hy4 preview or o3-pro?
Hy4 preview is cheaper. It lists at $0.83 per million input tokens and $2.50 per million output tokens; o3-pro lists at $20 and $80.
Is Hy4 preview or o3-pro better for coding?
o3-pro scores higher on coding benchmarks: 55.5 versus 51.6 in the Noometry coding category.
Which has the bigger context window?
Hy4 preview does, with 1.05M tokens against 200K.
How many benchmarks do Hy4 preview and o3-pro share?
0 benchmarks have published results for both models. Hy4 preview has 3 scored results on Noometry and o3-pro has 12.