Model comparison
Grok-2 (Dec 2024) vs MiMo-V2.5
MiMo-V2.5 is the stronger model overall, scoring 43.4 to 33.7 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Grok-2 (Dec 2024) scores higher in 0 categories and MiMo-V2.5 in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where MiMo-V2.5 leads 36.8 to 20.8.
- MiMo-V2.5 has downloadable open weights; the other is API-only.
Side by side
| Grok-2 (Dec 2024) | MiMo-V2.5 | |
|---|---|---|
| Provider | xAI | Xiaomi |
| Noometry Index | 33.7 | 43.4 |
| Released | 2024-08-13 | 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 | 34 | 23 |
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Category by category
Coding MiMo-V2.5 leads
Grok-2 (Dec 2024): 33.3 (#258), MiMo-V2.5: 43.9 (#81)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Coding | 1287 | 1469 |
| LMArena WebDev | — | 1438 |
| SciCode | — | 43.1% |
| WeirdML | 22.2% | — |
| LiveBench Coding | 46.4% | — |
| ALE-Bench | — | 513.95 |
Reasoning MiMo-V2.5 leads
Grok-2 (Dec 2024): 16.9 (#299), MiMo-V2.5: 28.6 (#101)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Hard Prompts | 1272 | 1450 |
| SimpleBench | 22.7% | — |
| CritPt | — | 3.7% |
| LiveBench Reasoning | 54.8% | — |
| DTBench | 65.2% | — |
| LiveBench Data Analysis | 54.5% | — |
| Epoch Capabilities Index | 130.48 | — |
| LiveBench | 54.3% | — |
Math MiMo-V2.5 leads
Grok-2 (Dec 2024): 20.8 (#284), MiMo-V2.5: 36.8 (#163)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Math | 1283 | 1436 |
| OTIS Mock AIME 2024-2025 | 11.5% | — |
| ProofBench | — | 16% |
| LiveBench Math | 54.9% | — |
| MATH Level 5 | 63.5% | — |
| FrontierMath (Feb 2025 set) | 0.7% | — |
Knowledge MiMo-V2.5 leads
Grok-2 (Dec 2024): 29.8 (#233), MiMo-V2.5: 40.8 (#115)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Expert | 1254 | 1460 |
| GPQA Diamond | 53.8% | — |
| Confabulations | 20.1% | — |
Multimodal Not comparable
Grok-2 (Dec 2024): —, MiMo-V2.5: 39.8 (#54)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Vision | — | 1247 |
Multilingual MiMo-V2.5 leads
Grok-2 (Dec 2024): 43.1 (#188), MiMo-V2.5: 51.9 (#99)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Non-English | 1282 | 1404 |
| LMArena Chinese | 1289 | 1468 |
| LMArena French | 1318 | 1447 |
| LMArena German | 1287 | 1421 |
| LMArena Japanese | 1244 | 1306 |
| LMArena Korean | 1237 | 1363 |
| LMArena Russian | 1286 | 1395 |
| LMArena Spanish | 1281 | 1416 |
Instruction Following MiMo-V2.5 leads
Grok-2 (Dec 2024): 66.9 (#202), MiMo-V2.5: 75.5 (#60)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Instruction Following | 1270 | 1434 |
| LiveBench Instruction Following | 69.6% | — |
Long Context MiMo-V2.5 leads
Grok-2 (Dec 2024): 38.8 (#190), MiMo-V2.5: 44.2 (#73)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Longer Query | 1276 | 1445 |
Writing & Preference MiMo-V2.5 leads
Grok-2 (Dec 2024): 48.6 (#198), MiMo-V2.5: 61.6 (#86)
| Benchmark | Grok-2 (Dec 2024) | MiMo-V2.5 |
|---|---|---|
| LMArena Text | 1305 | 1428 |
| LMArena Creative Writing | 1284 | 1393 |
| LMArena Multi-Turn | 1290 | 1445 |
| Short-Story Creative Writing | 63.6% | — |
| LiveBench Language | 45.6% | — |
Frequently asked questions
Is Grok-2 (Dec 2024) better than MiMo-V2.5?
MiMo-V2.5 is the stronger model overall, scoring 43.4 to 33.7 on the Noometry Index.
Is Grok-2 (Dec 2024) or MiMo-V2.5 better for coding?
MiMo-V2.5 scores higher on coding benchmarks: 43.9 versus 33.3 in the Noometry coding category.
How many benchmarks do Grok-2 (Dec 2024) and MiMo-V2.5 share?
17 benchmarks have published results for both models. Grok-2 (Dec 2024) has 34 scored results on Noometry and MiMo-V2.5 has 23.