Model comparison
MiMo-V2.5 vs Olmo 3.1 32b Instruct
MiMo-V2.5 is the stronger model overall, scoring 43.0 to 38.8 on the Noometry Index.
Last verified . 16 shared benchmarks.
Allen Institute for AI (Ai2)Summary
- They share 16 benchmarks with published results for both. MiMo-V2.5 scores higher in 8 categories and Olmo 3.1 32b Instruct in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where MiMo-V2.5 leads 61.8 to 50.4.
Side by side
| MiMo-V2.5 | Olmo 3.1 32b Instruct | |
|---|---|---|
| Provider | Xiaomi | Allen Institute for AI (Ai2) |
| Noometry Index | 43.0 | 38.8 |
| Released | 2026-04-22 | — |
| Weights | Open | Open |
| Context window | 1.05M | — |
| Max output | 131K | — |
| Input $ / M tokens | $0.14 | — |
| Output $ / M tokens | $0.28 | — |
| Results tracked | 23 | 16 |
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Category by category
Coding MiMo-V2.5 leads
MiMo-V2.5: 43.6 (#75), Olmo 3.1 32b Instruct: 38.9 (#154)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Coding | 1469 | 1346 |
| LMArena WebDev | 1438 | — |
| SciCode | 43.1% | — |
| ALE-Bench | 513.95 | — |
Reasoning MiMo-V2.5 leads
MiMo-V2.5: 27.8 (#98), Olmo 3.1 32b Instruct: 25.4 (#131)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1450 | 1322 |
| CritPt | 3.7% | — |
Math MiMo-V2.5 leads
MiMo-V2.5: 35.4 (#145), Olmo 3.1 32b Instruct: 33.6 (#169)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Math | 1436 | 1305 |
| ProofBench | 16% | — |
Knowledge MiMo-V2.5 leads
MiMo-V2.5: 40.2 (#109), Olmo 3.1 32b Instruct: 35.4 (#175)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Expert | 1459 | 1307 |
Multimodal Not comparable
MiMo-V2.5: 39.0 (#53), Olmo 3.1 32b Instruct: —
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Vision | 1245 | — |
Multilingual MiMo-V2.5 leads
MiMo-V2.5: 52.0 (#96), Olmo 3.1 32b Instruct: 42.8 (#185)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Non-English | 1404 | 1275 |
| LMArena Chinese | 1467 | 1304 |
| LMArena French | 1447 | 1328 |
| LMArena German | 1421 | 1283 |
| LMArena Korean | 1363 | 1206 |
| LMArena Russian | 1395 | 1268 |
| LMArena Spanish | 1412 | 1337 |
| LMArena Japanese | 1304 | — |
Instruction Following MiMo-V2.5 leads
MiMo-V2.5: 75.7 (#55), Olmo 3.1 32b Instruct: 68.8 (#182)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Instruction Following | 1433 | 1298 |
Long Context MiMo-V2.5 leads
MiMo-V2.5: 44.1 (#69), Olmo 3.1 32b Instruct: 39.9 (#161)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Longer Query | 1444 | 1312 |
Writing & Preference MiMo-V2.5 leads
MiMo-V2.5: 61.8 (#82), Olmo 3.1 32b Instruct: 50.4 (#179)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Text | 1427 | 1311 |
| LMArena Creative Writing | 1392 | 1264 |
| LMArena Multi-Turn | 1445 | 1309 |
Frequently asked questions
Is MiMo-V2.5 better than Olmo 3.1 32b Instruct?
MiMo-V2.5 is the stronger model overall, scoring 43.0 to 38.8 on the Noometry Index.
Is MiMo-V2.5 or Olmo 3.1 32b Instruct better for coding?
MiMo-V2.5 scores higher on coding benchmarks: 43.6 versus 38.9 in the Noometry coding category.
How many benchmarks do MiMo-V2.5 and Olmo 3.1 32b Instruct share?
16 benchmarks have published results for both models. MiMo-V2.5 has 23 scored results on Noometry and Olmo 3.1 32b Instruct has 16.