Model comparison
MiMo-V2-Flash vs Step 3.5 Flash
MiMo-V2-Flash and Step 3.5 Flash score almost the same on the Noometry Index (41.3 vs 42.3), so choose on price, context window or the category you care about most.
Last verified . 17 shared benchmarks.
StepFunSummary
- They share 17 benchmarks with published results for both. MiMo-V2-Flash scores higher in 6 categories and Step 3.5 Flash in 2 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in coding, where Step 3.5 Flash leads 42.4 to 36.1.
- Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.14 / $0.28 for MiMo-V2-Flash.
- MiMo-V2-Flash accepts more context: 262K tokens versus 256K.
Side by side
| MiMo-V2-Flash | Step 3.5 Flash | |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 41.3 | 42.3 |
| Released | 2025-12-16 | 2026-01-29 |
| Weights | Open | Open |
| Context window | 262K | 256K |
| Max output | 66K | 256K |
| Input $ / M tokens | $0.14 | $0.10 |
| Output $ / M tokens | $0.28 | $0.30 |
| Results tracked | 21 | 19 |
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Category by category
Coding Step 3.5 Flash leads
MiMo-V2-Flash: 36.1 (#211), Step 3.5 Flash: 42.4 (#105)
| Benchmark | MiMo-V2-Flash | Step 3.5 Flash |
|---|---|---|
| LMArena Coding | 1443 | 1436 |
| LMArena WebDev | 1330 | — |
| SciCode | 25.9% | — |
| ALE-Bench | 737.95 | — |
Reasoning MiMo-V2-Flash leads
MiMo-V2-Flash: 24.9 (#157), Step 3.5 Flash: 22.2 (#202)
| Benchmark | MiMo-V2-Flash | Step 3.5 Flash |
|---|---|---|
| LMArena Hard Prompts | 1420 | 1411 |
| NYT Connections (extended) | — | 28.4% |
| CritPt | 0% | — |
Math Step 3.5 Flash leads
MiMo-V2-Flash: 38.3 (#139), Step 3.5 Flash: 42.6 (#84)
| Benchmark | MiMo-V2-Flash | Step 3.5 Flash |
|---|---|---|
| LMArena Math | 1396 | 1408 |
| MathArena Final-Answer Competitions | — | 66.8% |
Knowledge Too close to call
MiMo-V2-Flash: 39.7 (#131), Step 3.5 Flash: 39.6 (#132)
| Benchmark | MiMo-V2-Flash | Step 3.5 Flash |
|---|---|---|
| LMArena Expert | 1425 | 1421 |
Multilingual Too close to call
MiMo-V2-Flash: 51.0 (#113), Step 3.5 Flash: 50.5 (#119)
| Benchmark | MiMo-V2-Flash | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | 1392 | 1385 |
| LMArena Chinese | 1462 | 1447 |
| LMArena French | 1429 | 1421 |
| LMArena German | 1395 | 1405 |
| LMArena Japanese | 1325 | 1354 |
| LMArena Korean | 1358 | 1352 |
| LMArena Russian | 1387 | 1385 |
| LMArena Spanish | 1420 | 1419 |
Instruction Following Too close to call
MiMo-V2-Flash: 73.5 (#120), Step 3.5 Flash: 73.1 (#124)
| Benchmark | MiMo-V2-Flash | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | 1392 | 1385 |
Long Context Too close to call
MiMo-V2-Flash: 43.0 (#110), Step 3.5 Flash: 42.8 (#117)
| Benchmark | MiMo-V2-Flash | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | 1409 | 1402 |
Writing & Preference Too close to call
MiMo-V2-Flash: 59.7 (#106), Step 3.5 Flash: 58.8 (#113)
| Benchmark | MiMo-V2-Flash | Step 3.5 Flash |
|---|---|---|
| LMArena Text | 1411 | 1403 |
| LMArena Creative Writing | 1375 | 1357 |
| LMArena Multi-Turn | 1404 | 1405 |
Frequently asked questions
Is MiMo-V2-Flash better than Step 3.5 Flash?
MiMo-V2-Flash and Step 3.5 Flash score almost the same on the Noometry Index (41.3 vs 42.3), so choose on price, context window or the category you care about most.
Which is cheaper, MiMo-V2-Flash or Step 3.5 Flash?
Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; MiMo-V2-Flash lists at $0.14 and $0.28.
Is MiMo-V2-Flash or Step 3.5 Flash better for coding?
Step 3.5 Flash scores higher on coding benchmarks: 42.4 versus 36.1 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2-Flash does, with 262K tokens against 256K.
How many benchmarks do MiMo-V2-Flash and Step 3.5 Flash share?
17 benchmarks have published results for both models. MiMo-V2-Flash has 21 scored results on Noometry and Step 3.5 Flash has 19.