Model comparison
gpt-oss-120b vs Hy4 preview
Hy4 preview is the stronger model overall, scoring 45.3 to 36.3 on the Noometry Index. gpt-oss-120b costs 16× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
TencentSummary
- The widest gap is in coding, where Hy4 preview leads 51.6 to 33.5.
- gpt-oss-120b is cheaper at $0.037 / $0.17 per million input/output tokens, against $0.75 / $2.25 for Hy4 preview.
- Hy4 preview accepts more context: 1.05M tokens versus 131K.
Side by side
| gpt-oss-120b | Hy4 preview | |
|---|---|---|
| Provider | OpenAI | Tencent |
| Noometry Index | 36.3 | 45.3 |
| Released | 2025-08-05 | 2026-08-28 |
| Weights | Open | Open |
| Context window | 131K | 1.05M |
| Max output | 41K | 64K |
| Input $ / M tokens | $0.037 | $0.75 |
| Output $ / M tokens | $0.17 | $2.25 |
| Results tracked | 48 | 3 |
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Category by category
Coding Hy4 preview leads
gpt-oss-120b: 33.5 (#256), Hy4 preview: 51.6 (#38)
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| SWE-bench Verified (bash only) | 26% | — |
| Aider Polyglot | 41.8% | — |
| LMArena WebDev | — | 1632 |
| SciCode | 36% | — |
| WeirdML | 48.2% | — |
| LMArena Coding | 1380 | — |
| ALE-Bench | 575.62 | — |
| AlgoTune | 1.41 | — |
Agentic & Tool Use Not comparable
gpt-oss-120b: 12.2 (#153), Hy4 preview: —
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| Terminal-Bench | 18.7% | — |
| APEX-Agents | 4.4% | — |
| METR Time Horizons | 56.6% | — |
| Vending-Bench 2 | -21.53 | — |
Reasoning Hy4 preview leads
gpt-oss-120b: 20.0 (#245), Hy4 preview: 31.9 (#79)
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| SimpleBench | 22.1% | — |
| Kagi LLM Benchmark | 58.6% | — |
| NYT Connections (extended) | — | 68.2% |
| CritPt | 1.1% | — |
| Chess Puzzles | 20% | — |
| LMArena Hard Prompts | 1364 | — |
| Mystery Game Puzzles | 2% | — |
| DTBench | 76.3% | — |
| LMCA | 22.1% | — |
| Surface Evolver Bench | 25% | — |
| Epoch Capabilities Index | 139.93 | — |
Math Hy4 preview leads
gpt-oss-120b: 52.5 (#50), Hy4 preview: 55.7 (#42)
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| ProofBench | — | 75% |
| Omni-MATH | 68.8% | — |
| LMArena Math | 1389 | — |
Knowledge Not comparable
gpt-oss-120b: 42.4 (#96), Hy4 preview: —
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| GPQA Diamond | 75.8% | — |
| MMLU-Pro | 79.5% | — |
| Confabulations | 15.7% | — |
| Vectara Hallucination Rate | 14.2% | — |
| GPQA (HELM) | 68.4% | — |
| LMArena Expert | 1356 | — |
Multilingual Not comparable
gpt-oss-120b: 48.0 (#147), Hy4 preview: —
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| LMArena Non-English | 1351 | — |
| LMArena Chinese | 1385 | — |
| LMArena French | 1369 | — |
| LMArena German | 1353 | — |
| LMArena Japanese | 1331 | — |
| LMArena Korean | 1282 | — |
| LMArena Russian | 1343 | — |
| LMArena Spanish | 1389 | — |
Instruction Following Not comparable
gpt-oss-120b: 69.3 (#173), Hy4 preview: —
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| IFEval | 83.6% | — |
| LMArena Instruction Following | 1318 | — |
Long Context Not comparable
gpt-oss-120b: 31.4 (#278), Hy4 preview: —
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| Fiction.LiveBench | 44.4% | — |
| LMArena Longer Query | 1319 | — |
Writing & Preference Not comparable
gpt-oss-120b: 46.5 (#217), Hy4 preview: —
| Benchmark | gpt-oss-120b | Hy4 preview |
|---|---|---|
| LMArena Text | 1365 | — |
| LMArena Creative Writing | 1275 | — |
| Short-Story Creative Writing | 77.1% | — |
| EQ-Bench Creative Writing | 961 | — |
| WildBench | 84.5% | — |
| LMArena Multi-Turn | 1340 | — |
Frequently asked questions
Is gpt-oss-120b better than Hy4 preview?
Hy4 preview is the stronger model overall, scoring 45.3 to 36.3 on the Noometry Index. gpt-oss-120b costs 16× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Which is cheaper, gpt-oss-120b or Hy4 preview?
gpt-oss-120b is cheaper. It lists at $0.037 per million input tokens and $0.17 per million output tokens; Hy4 preview lists at $0.75 and $2.25.
Is gpt-oss-120b or Hy4 preview better for coding?
Hy4 preview scores higher on coding benchmarks: 51.6 versus 33.5 in the Noometry coding category.
Which has the bigger context window?
Hy4 preview does, with 1.05M tokens against 131K.
How many benchmarks do gpt-oss-120b and Hy4 preview share?
0 benchmarks have published results for both models. gpt-oss-120b has 48 scored results on Noometry and Hy4 preview has 3.