Model comparison
MiMo-V2-Flash vs Step 2 16k Exp 202412
MiMo-V2-Flash is the stronger model overall, scoring 41.3 to 39.2 on the Noometry Index.
Last verified . 12 shared benchmarks.
StepFunSummary
- They share 12 benchmarks with published results for both. MiMo-V2-Flash scores higher in 6 categories and Step 2 16k Exp 202412 in 2 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where MiMo-V2-Flash leads 59.7 to 52.3.
- MiMo-V2-Flash has downloadable open weights; the other is API-only.
Side by side
| MiMo-V2-Flash | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 41.3 | 39.2 |
| Released | 2025-12-16 | — |
| Weights | Open | Proprietary |
| Context window | 262K | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.14 | — |
| Output $ / M tokens | $0.28 | — |
| Results tracked | 21 | 12 |
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Category by category
Coding Step 2 16k Exp 202412 leads
MiMo-V2-Flash: 36.1 (#211), Step 2 16k Exp 202412: 38.5 (#174)
| Benchmark | MiMo-V2-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1443 | 1316 |
| LMArena WebDev | 1330 | — |
| SciCode | 25.9% | — |
| ALE-Bench | 737.95 | — |
Reasoning Step 2 16k Exp 202412 leads
MiMo-V2-Flash: 24.9 (#157), Step 2 16k Exp 202412: 25.9 (#142)
| Benchmark | MiMo-V2-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1420 | 1299 |
| CritPt | 0% | — |
Math MiMo-V2-Flash leads
MiMo-V2-Flash: 38.3 (#139), Step 2 16k Exp 202412: 36.3 (#169)
| Benchmark | MiMo-V2-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1396 | 1304 |
Knowledge MiMo-V2-Flash leads
MiMo-V2-Flash: 39.7 (#131), Step 2 16k Exp 202412: 35.2 (#187)
| Benchmark | MiMo-V2-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1425 | 1279 |
Multilingual MiMo-V2-Flash leads
MiMo-V2-Flash: 51.0 (#113), Step 2 16k Exp 202412: 43.7 (#181)
| Benchmark | MiMo-V2-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1392 | 1290 |
| LMArena Chinese | 1462 | 1331 |
| LMArena Russian | 1387 | 1324 |
| LMArena French | 1429 | — |
| LMArena German | 1395 | — |
| LMArena Japanese | 1325 | — |
| LMArena Korean | 1358 | — |
| LMArena Spanish | 1420 | — |
Instruction Following MiMo-V2-Flash leads
MiMo-V2-Flash: 73.5 (#120), Step 2 16k Exp 202412: 67.9 (#192)
| Benchmark | MiMo-V2-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1392 | 1287 |
Long Context MiMo-V2-Flash leads
MiMo-V2-Flash: 43.0 (#110), Step 2 16k Exp 202412: 39.7 (#170)
| Benchmark | MiMo-V2-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1409 | 1307 |
Writing & Preference MiMo-V2-Flash leads
MiMo-V2-Flash: 59.7 (#106), Step 2 16k Exp 202412: 52.3 (#173)
| Benchmark | MiMo-V2-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1411 | 1321 |
| LMArena Creative Writing | 1375 | 1328 |
| LMArena Multi-Turn | 1404 | 1292 |
Frequently asked questions
Is MiMo-V2-Flash better than Step 2 16k Exp 202412?
MiMo-V2-Flash is the stronger model overall, scoring 41.3 to 39.2 on the Noometry Index.
Is MiMo-V2-Flash or Step 2 16k Exp 202412 better for coding?
Step 2 16k Exp 202412 scores higher on coding benchmarks: 38.5 versus 36.1 in the Noometry coding category.
How many benchmarks do MiMo-V2-Flash and Step 2 16k Exp 202412 share?
12 benchmarks have published results for both models. MiMo-V2-Flash has 21 scored results on Noometry and Step 2 16k Exp 202412 has 12.