Model comparison
MiMo-V2.6-Pro vs Step 2 16k Exp 202412
MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 38.6 on the Noometry Index.
Last verified . 12 shared benchmarks.
StepFunSummary
- They share 12 benchmarks with published results for both. MiMo-V2.6-Pro 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 coding, where MiMo-V2.6-Pro leads 53.2 to 37.9.
- MiMo-V2.6-Pro has downloadable open weights; the other is API-only.
Side by side
| MiMo-V2.6-Pro | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 46.7 | 38.6 |
| Released | 2026-09-22 | — |
| Weights | Open | Proprietary |
| Context window | 1.05M | — |
| Max output | 131K | — |
| Input $ / M tokens | $0.43 | — |
| Output $ / M tokens | $0.87 | — |
| Results tracked | 14 | 12 |
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Category by category
Coding MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 53.2 (#27), Step 2 16k Exp 202412: 37.9 (#170)
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1538 | 1316 |
| LMArena WebDev | 1618 | — |
Reasoning MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 30.4 (#76), Step 2 16k Exp 202412: 24.8 (#140)
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1511 | 1299 |
Math MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 37.9 (#91), Step 2 16k Exp 202412: 33.6 (#171)
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1497 | 1305 |
Knowledge MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 43.0 (#85), Step 2 16k Exp 202412: 34.6 (#187)
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1548 | 1279 |
Multimodal Not comparable
MiMo-V2.6-Pro: 40.2 (#40), Step 2 16k Exp 202412: —
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Vision | 1265 | — |
Multilingual MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 57.0 (#15), Step 2 16k Exp 202412: 43.9 (#176)
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1474 | 1290 |
| LMArena Chinese | 1532 | 1331 |
| LMArena Russian | 1481 | 1324 |
Instruction Following MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 78.2 (#10), Step 2 16k Exp 202412: 68.1 (#187)
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1490 | 1287 |
Long Context MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 46.0 (#26), Step 2 16k Exp 202412: 39.7 (#165)
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1500 | 1307 |
Writing & Preference MiMo-V2.6-Pro leads
MiMo-V2.6-Pro: 66.9 (#32), Step 2 16k Exp 202412: 52.5 (#168)
| Benchmark | MiMo-V2.6-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1491 | 1321 |
| LMArena Creative Writing | 1465 | 1328 |
| LMArena Multi-Turn | 1463 | 1292 |
Frequently asked questions
Is MiMo-V2.6-Pro better than Step 2 16k Exp 202412?
MiMo-V2.6-Pro is the stronger model overall, scoring 46.7 to 38.6 on the Noometry Index.
Is MiMo-V2.6-Pro or Step 2 16k Exp 202412 better for coding?
MiMo-V2.6-Pro scores higher on coding benchmarks: 53.2 versus 37.9 in the Noometry coding category.
How many benchmarks do MiMo-V2.6-Pro and Step 2 16k Exp 202412 share?
12 benchmarks have published results for both models. MiMo-V2.6-Pro has 14 scored results on Noometry and Step 2 16k Exp 202412 has 12.