Model comparison
MiMo-V2.5 vs Olmo 3.1 32b Instruct
MiMo-V2.5 is the stronger model overall, scoring 43.4 to 39.4 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; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where MiMo-V2.5 leads 61.6 to 50.2.
Side by side
| MiMo-V2.5 | Olmo 3.1 32b Instruct | |
|---|---|---|
| Provider | Xiaomi | Allen Institute for AI (Ai2) |
| Noometry Index | 43.4 | 39.4 |
| 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: 43.9 (#81), Olmo 3.1 32b Instruct: 39.5 (#157)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Coding | 1469 | 1347 |
| LMArena WebDev | 1438 | — |
| SciCode | 43.1% | — |
| ALE-Bench | 513.95 | — |
Reasoning MiMo-V2.5 leads
MiMo-V2.5: 28.6 (#101), Olmo 3.1 32b Instruct: 26.4 (#132)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Hard Prompts | 1450 | 1322 |
| CritPt | 3.7% | — |
Math Too close to call
MiMo-V2.5: 36.8 (#163), Olmo 3.1 32b Instruct: 36.3 (#167)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Math | 1436 | 1305 |
| ProofBench | 16% | — |
Knowledge MiMo-V2.5 leads
MiMo-V2.5: 40.8 (#115), Olmo 3.1 32b Instruct: 36.1 (#175)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Expert | 1460 | 1308 |
Multimodal Not comparable
MiMo-V2.5: 39.8 (#54), Olmo 3.1 32b Instruct: —
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Vision | 1247 | — |
Multilingual MiMo-V2.5 leads
MiMo-V2.5: 51.9 (#99), Olmo 3.1 32b Instruct: 42.6 (#191)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Non-English | 1404 | 1275 |
| LMArena Chinese | 1468 | 1304 |
| LMArena French | 1447 | 1328 |
| LMArena German | 1421 | 1282 |
| LMArena Korean | 1363 | 1206 |
| LMArena Russian | 1395 | 1268 |
| LMArena Spanish | 1416 | 1336 |
| LMArena Japanese | 1306 | — |
Instruction Following MiMo-V2.5 leads
MiMo-V2.5: 75.5 (#60), Olmo 3.1 32b Instruct: 68.6 (#187)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Instruction Following | 1434 | 1299 |
Long Context MiMo-V2.5 leads
MiMo-V2.5: 44.2 (#73), Olmo 3.1 32b Instruct: 39.9 (#166)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Longer Query | 1445 | 1312 |
Writing & Preference MiMo-V2.5 leads
MiMo-V2.5: 61.6 (#86), Olmo 3.1 32b Instruct: 50.2 (#185)
| Benchmark | MiMo-V2.5 | Olmo 3.1 32b Instruct |
|---|---|---|
| LMArena Text | 1428 | 1311 |
| LMArena Creative Writing | 1393 | 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 43.4 to 39.4 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: 43.9 versus 39.5 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.