Model comparison
Muse Glimmer vs Step 3.5 Flash
Muse Glimmer and Step 3.5 Flash score almost the same on the Noometry Index (41.7 vs 42.3), so choose on price, context window or the category you care about most.
Last verified . 12 shared benchmarks.
Meta
StepFunSummary
- They share 12 benchmarks with published results for both. Muse Glimmer scores higher in 1 category and Step 3.5 Flash in 7 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where Step 3.5 Flash leads 42.6 to 38.8.
Side by side
| Muse Glimmer | Step 3.5 Flash | |
|---|---|---|
| Provider | Meta | StepFun |
| Noometry Index | 41.7 | 42.3 |
| Released | 2026-08-10 | 2026-01-29 |
| Weights | Open | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.30 |
| Results tracked | 15 | 19 |
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Category by category
Coding Step 3.5 Flash leads
Muse Glimmer: 40.4 (#142), Step 3.5 Flash: 42.4 (#105)
| Benchmark | Muse Glimmer | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1416 | 1436 |
| LMArena WebDev | 1355 | — |
| SciCode | 44.9% | — |
Reasoning Muse Glimmer leads
Muse Glimmer: 25.7 (#144), Step 3.5 Flash: 22.2 (#202)
| Benchmark | Muse Glimmer | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1396 | 1411 |
| NYT Connections (extended) | — | 28.4% |
| CritPt | 2.6% | — |
Math Step 3.5 Flash leads
Muse Glimmer: 38.8 (#125), Step 3.5 Flash: 42.6 (#84)
| Benchmark | Muse Glimmer | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1417 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
Knowledge Step 3.5 Flash leads
Muse Glimmer: 38.5 (#143), Step 3.5 Flash: 39.6 (#132)
| Benchmark | Muse Glimmer | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1386 | 1421 |
Multilingual Too close to call
Muse Glimmer: 50.5 (#122), Step 3.5 Flash: 50.5 (#119)
| Benchmark | Muse Glimmer | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1384 | 1385 |
| LMArena Chinese | 1412 | 1447 |
| LMArena Russian | 1390 | 1385 |
| LMArena French | — | 1421 |
| LMArena German | — | 1405 |
| LMArena Japanese | — | 1354 |
| LMArena Korean | — | 1352 |
| LMArena Spanish | — | 1419 |
Instruction Following Too close to call
Muse Glimmer: 72.6 (#135), Step 3.5 Flash: 73.1 (#124)
| Benchmark | Muse Glimmer | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1375 | 1385 |
Long Context Too close to call
Muse Glimmer: 42.1 (#129), Step 3.5 Flash: 42.8 (#117)
| Benchmark | Muse Glimmer | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1382 | 1402 |
Writing & Preference Step 3.5 Flash leads
Muse Glimmer: 57.5 (#126), Step 3.5 Flash: 58.8 (#113)
| Benchmark | Muse Glimmer | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1389 | 1403 |
| LMArena Creative Writing | 1339 | 1357 |
| LMArena Multi-Turn | 1399 | 1405 |
Frequently asked questions
Is Muse Glimmer better than Step 3.5 Flash?
Muse Glimmer and Step 3.5 Flash score almost the same on the Noometry Index (41.7 vs 42.3), so choose on price, context window or the category you care about most.
Is Muse Glimmer or Step 3.5 Flash better for coding?
Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 40.4 in the Noometry coding category.
How many benchmarks do Muse Glimmer and Step 3.5 Flash share?
12 benchmarks have published results for both models. Muse Glimmer has 15 scored results on Noometry and Step 3.5 Flash has 19.