Model comparison
Qwen2.5 Plus 1127 vs Step 3.5 Flash
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 38.8 on the Noometry Index.
Last verified . 14 shared benchmarks.
Alibaba (Qwen)
StepFunSummary
- They share 14 benchmarks with published results for both. Qwen2.5 Plus 1127 scores higher in 1 category and Step 3.5 Flash in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Step 3.5 Flash leads 58.8 to 49.4.
- Step 3.5 Flash has downloadable open weights; the other is API-only.
Side by side
| Qwen2.5 Plus 1127 | Step 3.5 Flash | |
|---|---|---|
| Provider | Alibaba (Qwen) | StepFun |
| Noometry Index | 38.8 | 42.3 |
| Released | — | 2026-01-29 |
| Weights | Proprietary | Open |
| Context window | — | 256K |
| Max output | — | 256K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.30 |
| Results tracked | 14 | 19 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Step 3.5 Flash leads
Qwen2.5 Plus 1127: 38.5 (#175), Step 3.5 Flash: 42.4 (#105)
| Benchmark | Qwen2.5 Plus 1127 | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1314 | 1436 |
Reasoning Qwen2.5 Plus 1127 leads
Qwen2.5 Plus 1127: 25.9 (#141), Step 3.5 Flash: 22.2 (#202)
| Benchmark | Qwen2.5 Plus 1127 | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1299 | 1411 |
| NYT Connections (extended) | — | 28.4% |
Math Step 3.5 Flash leads
Qwen2.5 Plus 1127: 36.1 (#174), Step 3.5 Flash: 42.6 (#84)
| Benchmark | Qwen2.5 Plus 1127 | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1298 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
Knowledge Step 3.5 Flash leads
Qwen2.5 Plus 1127: 35.5 (#183), Step 3.5 Flash: 39.6 (#132)
| Benchmark | Qwen2.5 Plus 1127 | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1289 | 1421 |
Multilingual Step 3.5 Flash leads
Qwen2.5 Plus 1127: 41.9 (#201), Step 3.5 Flash: 50.5 (#119)
| Benchmark | Qwen2.5 Plus 1127 | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1265 | 1385 |
| LMArena Chinese | 1314 | 1447 |
| LMArena German | 1231 | 1405 |
| LMArena Japanese | 1207 | 1354 |
| LMArena Russian | 1271 | 1385 |
| LMArena French | — | 1421 |
| LMArena Korean | — | 1352 |
| LMArena Spanish | — | 1419 |
Instruction Following Step 3.5 Flash leads
Qwen2.5 Plus 1127: 67.2 (#199), Step 3.5 Flash: 73.1 (#124)
| Benchmark | Qwen2.5 Plus 1127 | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1275 | 1385 |
Long Context Step 3.5 Flash leads
Qwen2.5 Plus 1127: 39.2 (#184), Step 3.5 Flash: 42.8 (#117)
| Benchmark | Qwen2.5 Plus 1127 | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1292 | 1402 |
Writing & Preference Step 3.5 Flash leads
Qwen2.5 Plus 1127: 49.4 (#192), Step 3.5 Flash: 58.8 (#113)
| Benchmark | Qwen2.5 Plus 1127 | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1299 | 1403 |
| LMArena Creative Writing | 1262 | 1357 |
| LMArena Multi-Turn | 1299 | 1405 |
Frequently asked questions
Is Qwen2.5 Plus 1127 better than Step 3.5 Flash?
Step 3.5 Flash is the stronger model overall, scoring 42.3 to 38.8 on the Noometry Index.
Is Qwen2.5 Plus 1127 or Step 3.5 Flash better for coding?
Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 38.5 in the Noometry coding category.
How many benchmarks do Qwen2.5 Plus 1127 and Step 3.5 Flash share?
14 benchmarks have published results for both models. Qwen2.5 Plus 1127 has 14 scored results on Noometry and Step 3.5 Flash has 19.