Model comparison
MiMo-V2.5-Pro vs Step 2 16k Exp 202412
MiMo-V2.5-Pro is the stronger model overall, scoring 44.8 to 38.6 on the Noometry Index.
Last verified . 12 shared benchmarks.
StepFunSummary
- They share 12 benchmarks with published results for both. MiMo-V2.5-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 writing & preference, where MiMo-V2.5-Pro leads 65.5 to 52.5.
- MiMo-V2.5-Pro has downloadable open weights; the other is API-only.
Side by side
| MiMo-V2.5-Pro | Step 2 16k Exp 202412 | |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 44.8 | 38.6 |
| Released | 2026-04-22 | — |
| Weights | Open | Proprietary |
| Context window | 1.05M | — |
| Max output | 131K | — |
| Input $ / M tokens | $0.43 | — |
| Output $ / M tokens | $0.87 | — |
| Results tracked | 27 | 12 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding MiMo-V2.5-Pro leads
MiMo-V2.5-Pro: 47.0 (#58), Step 2 16k Exp 202412: 37.9 (#170)
| Benchmark | MiMo-V2.5-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Coding | 1502 | 1316 |
| LMArena WebDev | 1477 | — |
| SciCode | 50.2% | — |
| ALE-Bench | 899.8 | — |
Reasoning MiMo-V2.5-Pro leads
MiMo-V2.5-Pro: 25.9 (#124), Step 2 16k Exp 202412: 24.8 (#140)
| Benchmark | MiMo-V2.5-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Hard Prompts | 1487 | 1299 |
| NYT Connections (extended) | 34.4% | — |
| CritPt | 4% | — |
| DTBench | 84.5% | — |
| LMCA | 29.5% | — |
Math MiMo-V2.5-Pro leads
MiMo-V2.5-Pro: 38.6 (#84), Step 2 16k Exp 202412: 33.6 (#171)
| Benchmark | MiMo-V2.5-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Math | 1480 | 1305 |
| ProofBench | 22% | — |
Knowledge MiMo-V2.5-Pro leads
MiMo-V2.5-Pro: 41.5 (#100), Step 2 16k Exp 202412: 34.6 (#187)
| Benchmark | MiMo-V2.5-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Expert | 1501 | 1279 |
Multilingual MiMo-V2.5-Pro leads
MiMo-V2.5-Pro: 55.3 (#33), Step 2 16k Exp 202412: 43.9 (#176)
| Benchmark | MiMo-V2.5-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Non-English | 1449 | 1290 |
| LMArena Chinese | 1507 | 1331 |
| LMArena Russian | 1450 | 1324 |
| LMArena French | 1489 | — |
| LMArena German | 1455 | — |
| LMArena Japanese | 1418 | — |
| LMArena Korean | 1436 | — |
| LMArena Spanish | 1470 | — |
Instruction Following MiMo-V2.5-Pro leads
MiMo-V2.5-Pro: 77.6 (#21), Step 2 16k Exp 202412: 68.1 (#187)
| Benchmark | MiMo-V2.5-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Instruction Following | 1477 | 1287 |
Long Context MiMo-V2.5-Pro leads
MiMo-V2.5-Pro: 45.4 (#38), Step 2 16k Exp 202412: 39.7 (#165)
| Benchmark | MiMo-V2.5-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Longer Query | 1482 | 1307 |
Writing & Preference MiMo-V2.5-Pro leads
MiMo-V2.5-Pro: 65.5 (#47), Step 2 16k Exp 202412: 52.5 (#168)
| Benchmark | MiMo-V2.5-Pro | Step 2 16k Exp 202412 |
|---|---|---|
| LMArena Text | 1465 | 1321 |
| LMArena Creative Writing | 1440 | 1328 |
| LMArena Multi-Turn | 1477 | 1292 |
| EQ-Bench Creative Writing | 1493 | — |
| EQ-Bench 4 | 1208 | — |
Frequently asked questions
Is MiMo-V2.5-Pro better than Step 2 16k Exp 202412?
MiMo-V2.5-Pro is the stronger model overall, scoring 44.8 to 38.6 on the Noometry Index.
Is MiMo-V2.5-Pro or Step 2 16k Exp 202412 better for coding?
MiMo-V2.5-Pro scores higher on coding benchmarks: 47.0 versus 37.9 in the Noometry coding category.
How many benchmarks do MiMo-V2.5-Pro and Step 2 16k Exp 202412 share?
12 benchmarks have published results for both models. MiMo-V2.5-Pro has 27 scored results on Noometry and Step 2 16k Exp 202412 has 12.