Model comparison
MiMo-V2-Pro vs Step 5 Preview
Step 5 Preview is the stronger model overall, scoring 43.8 to 42.4 on the Noometry Index. MiMo-V2-Pro costs 2.6× less per token, which makes it the better buy when Step 5 Preview's lead doesn't matter for your workload.
Last verified . 1 shared benchmarks.
StepFunSummary
- They share 1 benchmark with published results for both. MiMo-V2-Pro scores higher in 0 categories and Step 5 Preview in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Step 5 Preview leads 38.0 to 21.3.
- MiMo-V2-Pro is cheaper at $0.43 / $0.87 per million input/output tokens, against $1 / $2.70 for Step 5 Preview.
- MiMo-V2-Pro accepts more context: 1.05M tokens versus 1.02M.
Side by side
| MiMo-V2-Pro | Step 5 Preview | |
|---|---|---|
| Provider | Xiaomi | StepFun |
| Noometry Index | 42.4 | 43.8 |
| Released | 2026-03-18 | 2026-09-16 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 1.02M |
| Max output | 131K | 66K |
| Input $ / M tokens | $0.43 | $1 |
| Output $ / M tokens | $0.87 | $2.70 |
| Results tracked | 23 | 3 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Step 5 Preview leads
MiMo-V2-Pro: 43.4 (#76), Step 5 Preview: 50.6 (#40)
| Benchmark | MiMo-V2-Pro | Step 5 Preview |
|---|---|---|
| LMArena WebDev | 1433 | 1569 |
| SciCode | — | 58.9% |
| LMArena Coding | 1476 | — |
| ALE-Bench | 785.17 | — |
Reasoning Step 5 Preview leads
MiMo-V2-Pro: 21.3 (#200), Step 5 Preview: 38.0 (#58)
| Benchmark | MiMo-V2-Pro | Step 5 Preview |
|---|---|---|
| NYT Connections (extended) | 25.8% | — |
| CritPt | — | 20.9% |
| Thematic Generalization | 45.9% | — |
| LMArena Hard Prompts | 1457 | — |
Math Not comparable
MiMo-V2-Pro: 36.7 (#104), Step 5 Preview: —
| Benchmark | MiMo-V2-Pro | Step 5 Preview |
|---|---|---|
| LMArena Math | 1447 | — |
Knowledge Not comparable
MiMo-V2-Pro: 40.8 (#106), Step 5 Preview: —
| Benchmark | MiMo-V2-Pro | Step 5 Preview |
|---|---|---|
| LMArena Expert | 1479 | — |
Multilingual Not comparable
MiMo-V2-Pro: 52.9 (#77), Step 5 Preview: —
| Benchmark | MiMo-V2-Pro | Step 5 Preview |
|---|---|---|
| LMArena Non-English | 1416 | — |
| LMArena Chinese | 1455 | — |
| LMArena French | 1470 | — |
| LMArena German | 1417 | — |
| LMArena Japanese | 1366 | — |
| LMArena Korean | 1401 | — |
| LMArena Russian | 1427 | — |
| LMArena Spanish | 1458 | — |
Instruction Following Not comparable
MiMo-V2-Pro: 76.2 (#46), Step 5 Preview: —
| Benchmark | MiMo-V2-Pro | Step 5 Preview |
|---|---|---|
| LMArena Instruction Following | 1444 | — |
Long Context Not comparable
MiMo-V2-Pro: 41.5 (#133), Step 5 Preview: —
| Benchmark | MiMo-V2-Pro | Step 5 Preview |
|---|---|---|
| CL-bench | 15.7% | — |
| CL-bench Life | 6.9% | — |
| LMArena Longer Query | 1455 | — |
Writing & Preference Not comparable
MiMo-V2-Pro: 62.9 (#67), Step 5 Preview: —
| Benchmark | MiMo-V2-Pro | Step 5 Preview |
|---|---|---|
| LMArena Text | 1436 | — |
| LMArena Creative Writing | 1415 | — |
| LMArena Multi-Turn | 1456 | — |
Frequently asked questions
Is MiMo-V2-Pro better than Step 5 Preview?
Step 5 Preview is the stronger model overall, scoring 43.8 to 42.4 on the Noometry Index. MiMo-V2-Pro costs 2.6× less per token, which makes it the better buy when Step 5 Preview's lead doesn't matter for your workload.
Which is cheaper, MiMo-V2-Pro or Step 5 Preview?
MiMo-V2-Pro is cheaper. It lists at $0.43 per million input tokens and $0.87 per million output tokens; Step 5 Preview lists at $1 and $2.70.
Is MiMo-V2-Pro or Step 5 Preview better for coding?
Step 5 Preview scores higher on coding benchmarks: 50.6 versus 43.4 in the Noometry coding category.
Which has the bigger context window?
MiMo-V2-Pro does, with 1.05M tokens against 1.02M.
How many benchmarks do MiMo-V2-Pro and Step 5 Preview share?
1 benchmark has published results for both models. MiMo-V2-Pro has 23 scored results on Noometry and Step 5 Preview has 3.