Model comparison
Grok 4.1 vs MiMo-V2.5
MiMo-V2.5 is the stronger model overall, scoring 43.0 to 40.8 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. Grok 4.1 scores higher in 4 categories and MiMo-V2.5 in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in coding, where MiMo-V2.5 leads 43.6 to 33.4.
- MiMo-V2.5 has downloadable open weights; the other is API-only.
Side by side
| Grok 4.1 | MiMo-V2.5 | |
|---|---|---|
| Provider | xAI | Xiaomi |
| Noometry Index | 40.8 | 43.0 |
| Released | 2025-11-17 | 2026-04-22 |
| Weights | Proprietary | Open |
| Context window | — | 1.05M |
| Max output | — | 131K |
| Input $ / M tokens | — | $0.14 |
| Output $ / M tokens | — | $0.28 |
| Results tracked | 19 | 23 |
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Category by category
Coding MiMo-V2.5 leads
Grok 4.1: 33.4 (#246), MiMo-V2.5: 43.6 (#75)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena WebDev | 1214 | 1438 |
| LMArena Coding | 1445 | 1469 |
| SciCode | — | 43.1% |
| ALE-Bench | — | 513.95 |
Agentic & Tool Use Not comparable
Grok 4.1: 33.8 (#47), MiMo-V2.5: —
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| Cybench | 39% | — |
Reasoning Too close to call
Grok 4.1: 28.3 (#91), MiMo-V2.5: 27.8 (#98)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena Hard Prompts | 1436 | 1450 |
| CritPt | — | 3.7% |
Math Too close to call
Grok 4.1: 36.2 (#124), MiMo-V2.5: 35.4 (#145)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena Math | 1422 | 1436 |
| ProofBench | — | 16% |
Knowledge MiMo-V2.5 leads
Grok 4.1: 38.9 (#129), MiMo-V2.5: 40.2 (#109)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena Expert | 1417 | 1459 |
Multimodal Not comparable
Grok 4.1: —, MiMo-V2.5: 39.0 (#53)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena Vision | — | 1245 |
Multilingual Grok 4.1 leads
Grok 4.1: 53.6 (#64), MiMo-V2.5: 52.0 (#96)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena Non-English | 1425 | 1404 |
| LMArena Chinese | 1464 | 1467 |
| LMArena French | 1448 | 1447 |
| LMArena German | 1447 | 1421 |
| LMArena Japanese | 1396 | 1304 |
| LMArena Korean | 1407 | 1363 |
| LMArena Russian | 1434 | 1395 |
| LMArena Spanish | 1438 | 1412 |
Instruction Following MiMo-V2.5 leads
Grok 4.1: 74.0 (#106), MiMo-V2.5: 75.7 (#55)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena Instruction Following | 1400 | 1433 |
Long Context Too close to call
Grok 4.1: 43.2 (#96), MiMo-V2.5: 44.1 (#69)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena Longer Query | 1416 | 1444 |
Writing & Preference Too close to call
Grok 4.1: 62.6 (#71), MiMo-V2.5: 61.8 (#82)
| Benchmark | Grok 4.1 | MiMo-V2.5 |
|---|---|---|
| LMArena Text | 1437 | 1427 |
| LMArena Creative Writing | 1411 | 1392 |
| LMArena Multi-Turn | 1438 | 1445 |
Frequently asked questions
Is Grok 4.1 better than MiMo-V2.5?
MiMo-V2.5 is the stronger model overall, scoring 43.0 to 40.8 on the Noometry Index.
Is Grok 4.1 or MiMo-V2.5 better for coding?
MiMo-V2.5 scores higher on coding benchmarks: 43.6 versus 33.4 in the Noometry coding category.
How many benchmarks do Grok 4.1 and MiMo-V2.5 share?
18 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and MiMo-V2.5 has 23.