Model comparison
MiMo-V2.6-Flash vs Step 2 16k Exp 202412
MiMo-V2.6-Flash is the stronger model overall, scoring 48.5 to 39.2 on the Noometry Index.
Last verified . 12 shared benchmarks.
StepFunSummary
- They share 12 benchmarks with published results for both. MiMo-V2.6-Flash scores higher in 8 categories and Step 2 16k Exp 202412 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where MiMo-V2.6-Flash leads 51.9 to 36.3.
- MiMo-V2.6-Flash has downloadable open weights; the other is API-only.
Side by side
| MiMo-V2.6-Flash | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 48.5 | 39.2 |
| Released | 2026-09-21 | — |
| Weights | Open | Proprietary |
| Context window | 1.05M | — |
| Max output | 131K | — |
| Input $ / M tokens | $0.14 | — |
| Output $ / M tokens | $0.28 | — |
| Results tracked | 19 | 12 |
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Category by category
Coding MiMo-V2.6-Flash leads
MiMo-V2.6-Flash: 53.4 (#30), Step 2 16k Exp 202412: 38.5 (#174)
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1504 | 1316 |
| LMArena WebDev | 1637 | — |
| SciCode | 51.3% | — |
Reasoning MiMo-V2.6-Flash leads
MiMo-V2.6-Flash: 36.5 (#66), Step 2 16k Exp 202412: 25.9 (#142)
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1482 | 1299 |
| CritPt | 12% | — |
Math MiMo-V2.6-Flash leads
MiMo-V2.6-Flash: 51.9 (#52), Step 2 16k Exp 202412: 36.3 (#169)
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1468 | 1304 |
| ProofBench | 63% | — |
Knowledge MiMo-V2.6-Flash leads
MiMo-V2.6-Flash: 42.2 (#99), Step 2 16k Exp 202412: 35.2 (#187)
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1501 | 1279 |
Multimodal Not comparable
MiMo-V2.6-Flash: 40.5 (#47), Step 2 16k Exp 202412: —
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Vision | 1259 | — |
Multilingual MiMo-V2.6-Flash leads
MiMo-V2.6-Flash: 54.0 (#51), Step 2 16k Exp 202412: 43.7 (#181)
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1434 | 1290 |
| LMArena Chinese | 1511 | 1331 |
| LMArena Russian | 1409 | 1324 |
| LMArena French | 1475 | — |
| LMArena Spanish | 1456 | — |
Instruction Following MiMo-V2.6-Flash leads
MiMo-V2.6-Flash: 76.8 (#35), Step 2 16k Exp 202412: 67.9 (#192)
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1463 | 1287 |
Long Context MiMo-V2.6-Flash leads
MiMo-V2.6-Flash: 44.8 (#57), Step 2 16k Exp 202412: 39.7 (#170)
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1463 | 1307 |
Writing & Preference MiMo-V2.6-Flash leads
MiMo-V2.6-Flash: 63.1 (#67), Step 2 16k Exp 202412: 52.3 (#173)
| Benchmark | MiMo-V2.6-Flash | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1455 | 1321 |
| LMArena Creative Writing | 1400 | 1328 |
| LMArena Multi-Turn | 1451 | 1292 |
Frequently asked questions
Is MiMo-V2.6-Flash better than Step 2 16k Exp 202412?
MiMo-V2.6-Flash is the stronger model overall, scoring 48.5 to 39.2 on the Noometry Index.
Is MiMo-V2.6-Flash or Step 2 16k Exp 202412 better for coding?
MiMo-V2.6-Flash scores higher on coding benchmarks: 53.4 versus 38.5 in the Noometry coding category.
How many benchmarks do MiMo-V2.6-Flash and Step 2 16k Exp 202412 share?
12 benchmarks have published results for both models. MiMo-V2.6-Flash has 19 scored results on Noometry and Step 2 16k Exp 202412 has 12.