Model comparison
Hy4 preview vs Step 1o Turbo 202506
Hy4 preview is the stronger model overall, scoring 45.3 to 39.7 on the Noometry Index.
Last verified . 0 shared benchmarks.
Tencent
StepFunSummary
- The widest gap is in math, where Hy4 preview leads 55.7 to 36.6.
- Hy4 preview has downloadable open weights; the other is API-only.
Side by side
| Hy4 preview | Step 1o Turbo 202506 | |
|---|---|---|
| Provider | Tencent | StepFun |
| Noometry Index | 45.3 | 39.7 |
| Released | 2026-08-28 | — |
| Weights | Open | Proprietary |
| Context window | 1.05M | — |
| Max output | 64K | — |
| Input $ / M tokens | $0.75 | — |
| Output $ / M tokens | $2.25 | — |
| Results tracked | 3 | 14 |
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Category by category
Coding Hy4 preview leads
Hy4 preview: 51.6 (#38), Step 1o Turbo 202506: 39.2 (#160)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| LMArena WebDev | 1632 | — |
| LMArena Coding | — | 1339 |
Reasoning Hy4 preview leads
Hy4 preview: 31.9 (#79), Step 1o Turbo 202506: 26.8 (#129)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| NYT Connections (extended) | 68.2% | — |
| LMArena Hard Prompts | — | 1335 |
Math Hy4 preview leads
Hy4 preview: 55.7 (#42), Step 1o Turbo 202506: 36.6 (#164)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| ProofBench | 75% | — |
| LMArena Math | — | 1318 |
Knowledge Not comparable
Hy4 preview: —, Step 1o Turbo 202506: 36.1 (#176)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Expert | — | 1308 |
Multimodal Not comparable
Hy4 preview: —, Step 1o Turbo 202506: 36.1 (#80)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Vision | — | 1186 |
Multilingual Not comparable
Hy4 preview: —, Step 1o Turbo 202506: 45.3 (#173)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Non-English | — | 1313 |
| LMArena Chinese | — | 1380 |
| LMArena German | — | 1314 |
| LMArena Russian | — | 1327 |
Instruction Following Not comparable
Hy4 preview: —, Step 1o Turbo 202506: 69.2 (#176)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Instruction Following | — | 1310 |
Long Context Not comparable
Hy4 preview: —, Step 1o Turbo 202506: 41.0 (#146)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Longer Query | — | 1348 |
Writing & Preference Not comparable
Hy4 preview: —, Step 1o Turbo 202506: 53.1 (#160)
| Benchmark | Hy4 preview | Step 1o Turbo 202506 |
|---|---|---|
| LMArena Text | — | 1336 |
| LMArena Creative Writing | — | 1307 |
| LMArena Multi-Turn | — | 1340 |
Frequently asked questions
Is Hy4 preview better than Step 1o Turbo 202506?
Hy4 preview is the stronger model overall, scoring 45.3 to 39.7 on the Noometry Index.
Is Hy4 preview or Step 1o Turbo 202506 better for coding?
Hy4 preview scores higher on coding benchmarks: 51.6 versus 39.2 in the Noometry coding category.
How many benchmarks do Hy4 preview and Step 1o Turbo 202506 share?
0 benchmarks have published results for both models. Hy4 preview has 3 scored results on Noometry and Step 1o Turbo 202506 has 14.