# Muse Glimmer vs Step 5 Preview

> Step 5 Preview is the stronger model overall, scoring 47.9 to 41.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/muse-glimmer-vs-step-5-preview
- Last updated: 2026-10-11
- Shared benchmarks: 15

## Summary

- They share 15 benchmarks with published results for both. Muse Glimmer scores higher in 0 categories and Step 5 Preview in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 5 Preview leads 40.0 to 25.7.
- The biggest single-benchmark swing is CritPt: 2.6% for Muse Glimmer and 20.9% for Step 5 Preview.
- Muse Glimmer has downloadable open weights; the other is API-only.

## Snapshot

| | Muse Glimmer | Step 5 Preview |
|---|---|---|
| Provider | Meta | StepFun |
| Noometry Index | 41.7 | 47.9 |
| Rank | 131 | 58 |
| Context | — | 1.02M |
| Input $/M | — | $1 |
| Output $/M | — | $2.70 |
| Weights | Open | Proprietary |

## Coding

- Muse Glimmer: 40.4 (#142)
- Step 5 Preview: 51.8 (#36)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| LMArena WebDev | 1355 | 1564 |
| SciCode | 44.9% | 58.9% |
| LMArena Coding | 1416 | 1480 |

## Reasoning

- Muse Glimmer: 25.7 (#144)
- Step 5 Preview: 40.0 (#57)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| CritPt | 2.6% | 20.9% |
| LMArena Hard Prompts | 1396 | 1465 |

## Math

- Muse Glimmer: 38.8 (#125)
- Step 5 Preview: 46.1 (#72)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| LMArena Math | 1417 | 1470 |
| ProofBench | — | 42% |

## Knowledge

- Muse Glimmer: 38.5 (#143)
- Step 5 Preview: 41.2 (#112)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1386 | 1470 |

## Multimodal

- Muse Glimmer: —
- Step 5 Preview: 41.0 (#41)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| LMArena Vision | — | 1267 |

## Multilingual

- Muse Glimmer: 50.5 (#122)
- Step 5 Preview: 53.8 (#54)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1384 | 1432 |
| LMArena Chinese | 1412 | 1519 |
| LMArena Russian | 1390 | 1436 |
| LMArena Spanish | — | 1439 |

## Instruction Following

- Muse Glimmer: 72.6 (#135)
- Step 5 Preview: 76.0 (#50)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1375 | 1444 |

## Long Context

- Muse Glimmer: 42.1 (#129)
- Step 5 Preview: 44.5 (#64)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| LMArena Longer Query | 1382 | 1455 |

## Writing & Preference

- Muse Glimmer: 57.5 (#126)
- Step 5 Preview: 62.8 (#71)

| Benchmark | Muse Glimmer | Step 5 Preview |
|---|---|---|
| LMArena Text | 1389 | 1442 |
| LMArena Creative Writing | 1339 | 1410 |
| LMArena Multi-Turn | 1399 | 1447 |

## FAQ

### Is Muse Glimmer better than Step 5 Preview?

Step 5 Preview is the stronger model overall, scoring 47.9 to 41.7 on the Noometry Index.

### Is Muse Glimmer or Step 5 Preview better for coding?

Step 5 Preview scores higher on coding benchmarks: 51.8 versus 40.4 in the Noometry coding category.

### How many benchmarks do Muse Glimmer and Step 5 Preview share?

15 benchmarks have published results for both models. Muse Glimmer has 15 scored results on Noometry and Step 5 Preview has 18.