# Step 3 vs Step 5 Preview

> Step 5 Preview is the stronger model overall, scoring 43.8 to 39.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/step-3-vs-step-5-preview
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where Step 5 Preview leads 50.6 to 39.5.
- Step 3 has downloadable open weights; the other is API-only.

## Snapshot

| | Step 3 | Step 5 Preview |
|---|---|---|
| Provider | StepFun | StepFun |
| Noometry Index | 39.9 | 43.8 |
| Rank | 145 | 78 |
| Context | — | 1.02M |
| Input $/M | — | $1 |
| Output $/M | — | $2.70 |
| Weights | Open | Proprietary |

## Coding

- Step 3: 39.5 (#144)
- Step 5 Preview: 50.6 (#40)

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| LMArena WebDev | — | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1367 | — |

## Reasoning

- Step 3: 27.6 (#102)
- Step 5 Preview: 38.0 (#58)

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| Kagi LLM Benchmark | 62.3% | — |
| CritPt | — | 20.9% |
| LMArena Hard Prompts | 1355 | — |

## Math

- Step 3: 34.9 (#148)
- Step 5 Preview: —

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| LMArena Math | 1366 | — |

## Knowledge

- Step 3: 36.2 (#161)
- Step 5 Preview: —

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1333 | — |

## Multimodal

- Step 3: 34.9 (#81)
- Step 5 Preview: —

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| LMArena Vision | 1176 | — |

## Multilingual

- Step 3: 46.5 (#154)
- Step 5 Preview: —

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1327 | — |
| LMArena Chinese | 1396 | — |
| LMArena German | 1371 | — |
| LMArena Korean | 1271 | — |
| LMArena Russian | 1331 | — |
| LMArena Spanish | 1372 | — |

## Instruction Following

- Step 3: 70.6 (#159)
- Step 5 Preview: —

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1332 | — |

## Long Context

- Step 3: 40.3 (#152)
- Step 5 Preview: —

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1326 | — |

## Writing & Preference

- Step 3: 54.5 (#146)
- Step 5 Preview: —

| Benchmark | Step 3 | Step 5 Preview |
|---|---|---|
| LMArena Text | 1351 | — |
| LMArena Creative Writing | 1322 | — |
| LMArena Multi-Turn | 1340 | — |

## FAQ

### Is Step 3 better than Step 5 Preview?

Step 5 Preview is the stronger model overall, scoring 43.8 to 39.9 on the Noometry Index.

### Is Step 3 or Step 5 Preview better for coding?

Step 5 Preview scores higher on coding benchmarks: 50.6 versus 39.5 in the Noometry coding category.

### How many benchmarks do Step 3 and Step 5 Preview share?

0 benchmarks have published results for both models. Step 3 has 17 scored results on Noometry and Step 5 Preview has 3.