Model comparison
Hy3 vs Step 5 Preview
Hy3 and Step 5 Preview score almost the same on the Noometry Index (43.6 vs 43.8), so choose on price, context window or the category you care about most.
Last verified . 1 shared benchmarks.
Tencent
StepFunSummary
- They share 1 benchmark with published results for both. Hy3 scores higher in 0 categories and Step 5 Preview in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 25.0.
- Hy3 is cheaper at $0.13 / $0.53 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
- Step 5 Preview accepts more context: 1.02M tokens versus 262K.
- Hy3 has downloadable open weights; the other is API-only.
Side by side
| Hy3 | Step 5 Preview | |
|---|---|---|
| Provider | Tencent | StepFun |
| Noometry Index | 43.6 | 43.8 |
| Released | 2026-07-06 | 2026-09-16 |
| Weights | Open | Proprietary |
| Context window | 262K | 1.02M |
| Max output | 128K | 66K |
| Input $ / M tokens | $0.13 | $1 |
| Output $ / M tokens | $0.53 | $2.70 |
| Results tracked | 17 | 3 |
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Category by category
Coding Step 5 Preview leads
Hy3: 46.6 (#60), Step 5 Preview: 50.6 (#40)
| Benchmark | Hy3 | Step 5 Preview |
|---|---|---|
| LMArena WebDev | 1509 | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1465 | — |
Reasoning Step 5 Preview leads
Hy3: 25.0 (#134), Step 5 Preview: 38.0 (#58)
| Benchmark | Hy3 | Step 5 Preview |
|---|---|---|
| NYT Connections (extended) | 41.2% | — |
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1449 | — |
Math Not comparable
Hy3: 37.4 (#98), Step 5 Preview: —
| Benchmark | Hy3 | Step 5 Preview |
|---|---|---|
| LMArena Math | 1475 | — |
Knowledge Not comparable
Hy3: 40.2 (#108), Step 5 Preview: —
| Benchmark | Hy3 | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1461 | — |
Multilingual Not comparable
Hy3: 53.7 (#60), Step 5 Preview: —
| Benchmark | Hy3 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1427 | — |
| LMArena Chinese | 1496 | — |
| LMArena French | 1461 | — |
| LMArena Korean | 1390 | — |
| LMArena Russian | 1435 | — |
| LMArena Spanish | 1448 | — |
Instruction Following Not comparable
Hy3: 75.3 (#68), Step 5 Preview: —
| Benchmark | Hy3 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1425 | — |
Long Context Not comparable
Hy3: 44.1 (#70), Step 5 Preview: —
| Benchmark | Hy3 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1443 | — |
Writing & Preference Not comparable
Hy3: 62.5 (#75), Step 5 Preview: —
| Benchmark | Hy3 | Step 5 Preview |
|---|---|---|
| LMArena Text | 1442 | — |
| LMArena Creative Writing | 1399 | — |
| LMArena Multi-Turn | 1436 | — |
Frequently asked questions
Is Hy3 better than Step 5 Preview?
Hy3 and Step 5 Preview score almost the same on the Noometry Index (43.6 vs 43.8), so choose on price, context window or the category you care about most.
Which is cheaper, Hy3 or Step 5 Preview?
Hy3 is cheaper. It lists at $0.13 per million input tokens and $0.53 per million output tokens; Step 5 Preview lists at $1 and $2.70.
Is Hy3 or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 46.6 in the Noometry coding category.
Which has the bigger context window?
Step 5 Preview does, with 1.02M tokens against 262K.
How many benchmarks do Hy3 and Step 5 Preview share?
1 benchmark has published results for both models. Hy3 has 17 scored results on Noometry and Step 5 Preview has 3.