Model comparison
Hy3 vs Step 3.7 Flash
Hy3 is the stronger model overall, scoring 44.2 to 37.3 on the Noometry Index.
Last verified . 1 shared benchmarks.
Tencent
StepFunSummary
- They share 1 benchmark with published results for both. Hy3 scores higher in 2 categories and Step 3.7 Flash in 1 category; 3 gaps are clear of the uncertainty.
- The widest gap is in coding, where Hy3 leads 46.8 to 40.0.
- Hy3 is cheaper at $0.13 / $0.53 per million input/output tokens, against $0.18 / $1.11 for Step 3.7 Flash.
- Hy3 accepts more context: 262K tokens versus 256K.
Side by side
| Hy3 | Step 3.7 Flash | |
|---|---|---|
| Provider | Tencent | StepFun |
| Noometry Index | 44.2 | 37.3 |
| Released | 2026-07-06 | 2026-05-29 |
| Weights | Open | Open |
| Context window | 262K | 256K |
| Max output | 128K | 256K |
| Input $ / M tokens | $0.13 | $0.18 |
| Output $ / M tokens | $0.53 | $1.11 |
| Results tracked | 19 | 5 |
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Category by category
Coding Hy3 leads
Hy3: 46.8 (#63), Step 3.7 Flash: 40.0 (#150)
| Benchmark | Hy3 | Step 3.7 Flash |
|---|---|---|
| LMArena WebDev | 1508 | — |
| SciCode | — | 40% |
| LMArena Coding | 1464 | — |
| ALE-Bench | — | 694.12 |
Reasoning Hy3 leads
Hy3: 26.1 (#136), Step 3.7 Flash: 21.6 (#219)
| Benchmark | Hy3 | Step 3.7 Flash |
|---|---|---|
| NYT Connections (extended) | 41.2% | 39.7% |
| CritPt | — | 2.3% |
| LMArena Hard Prompts | 1447 | — |
Math Step 3.7 Flash leads
Hy3: 40.1 (#93), Step 3.7 Flash: 42.9 (#82)
| Benchmark | Hy3 | Step 3.7 Flash |
|---|---|---|
| MathArena Final-Answer Competitions | — | 68.5% |
| LMArena Math | 1475 | — |
Knowledge Not comparable
Hy3: 40.8 (#114), Step 3.7 Flash: —
| Benchmark | Hy3 | Step 3.7 Flash |
|---|---|---|
| LMArena Expert | 1460 | — |
Multilingual Not comparable
Hy3: 53.5 (#65), Step 3.7 Flash: —
| Benchmark | Hy3 | Step 3.7 Flash |
|---|---|---|
| LMArena Non-English | 1426 | — |
| LMArena Chinese | 1493 | — |
| LMArena French | 1461 | — |
| LMArena German | 1439 | — |
| LMArena Japanese | 1392 | — |
| LMArena Korean | 1395 | — |
| LMArena Russian | 1432 | — |
| LMArena Spanish | 1456 | — |
Instruction Following Not comparable
Hy3: 75.1 (#70), Step 3.7 Flash: —
| Benchmark | Hy3 | Step 3.7 Flash |
|---|---|---|
| LMArena Instruction Following | 1426 | — |
Long Context Not comparable
Hy3: 44.1 (#75), Step 3.7 Flash: —
| Benchmark | Hy3 | Step 3.7 Flash |
|---|---|---|
| LMArena Longer Query | 1442 | — |
Writing & Preference Not comparable
Hy3: 62.2 (#81), Step 3.7 Flash: —
| Benchmark | Hy3 | Step 3.7 Flash |
|---|---|---|
| LMArena Text | 1439 | — |
| LMArena Creative Writing | 1402 | — |
| LMArena Multi-Turn | 1436 | — |
Frequently asked questions
Is Hy3 better than Step 3.7 Flash?
Hy3 is the stronger model overall, scoring 44.2 to 37.3 on the Noometry Index.
Which is cheaper, Hy3 or Step 3.7 Flash?
Hy3 is cheaper. It lists at $0.13 per million input tokens and $0.53 per million output tokens; Step 3.7 Flash lists at $0.18 and $1.11.
Is Hy3 or Step 3.7 Flash better for coding?
Hy3 scores higher on coding benchmarks: 46.8 versus 40.0 in the Noometry coding category.
Which has the bigger context window?
Hy3 does, with 262K tokens against 256K.
How many benchmarks do Hy3 and Step 3.7 Flash share?
1 benchmark has published results for both models. Hy3 has 19 scored results on Noometry and Step 3.7 Flash has 5.