Model comparison
Grok 4 vs MiMo-V2.5-Pro
Grok 4 is the stronger model overall, scoring 48.1 to 45.2 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Grok 4 scores higher in 6 categories and MiMo-V2.5-Pro in 2 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 leads 63.1 to 45.4.
- MiMo-V2.5-Pro has downloadable open weights; the other is API-only.
Side by side
| Grok 4 | MiMo-V2.5-Pro | |
|---|---|---|
| Provider | xAI | Xiaomi |
| Noometry Index | 48.1 | 45.2 |
| Released | 2025-07-09 | 2026-04-22 |
| Weights | Proprietary | Open |
| Context window | — | 1.05M |
| Max output | — | 131K |
| Input $ / M tokens | — | $0.43 |
| Output $ / M tokens | — | $0.87 |
| Results tracked | 48 | 27 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Grok 4 leads
Grok 4: 50.3 (#46), MiMo-V2.5-Pro: 47.4 (#60)
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Coding | 1408 | 1503 |
| Aider Polyglot | 79.6% | — |
| LMArena WebDev | — | 1479 |
| SciCode | — | 50.2% |
| WeirdML | 45.7% | — |
| ALE-Bench | — | 899.8 |
Agentic & Tool Use Not comparable
Grok 4: 32.3 (#68), MiMo-V2.5-Pro: —
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| Terminal-Bench | 27.2% | — |
| Berkeley Function Calling Leaderboard | 63% | — |
| GDPval | 21.1% | — |
| Cybench | 43% | — |
| DeepResearch Bench | 47.3% | — |
| BALROG | 43.6% | — |
| LMArena Search | 1142 | — |
| METR Time Horizons | 66.6% | — |
Reasoning Grok 4 leads
Grok 4: 36.7 (#65), MiMo-V2.5-Pro: 26.8 (#130)
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Hard Prompts | 1409 | 1488 |
| ARC-AGI-2 | 16% | — |
| SimpleBench | 60.5% | — |
| Kagi LLM Benchmark | 73.6% | — |
| NYT Connections (extended) | — | 34.4% |
| ARC-AGI-1 | 66.7% | — |
| CritPt | — | 4% |
| Chess Puzzles | 28% | — |
| DTBench | — | 84.5% |
| LMCA | — | 29.5% |
| Epoch Capabilities Index | 146.44 | — |
| ForecastBench | 60.9 | — |
Math Grok 4 leads
Grok 4: 48.4 (#64), MiMo-V2.5-Pro: 40.0 (#96)
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Math | 1422 | 1481 |
| OTIS Mock AIME 2024-2025 | 84% | — |
| ProofBench | — | 22% |
| Omni-MATH | 60.3% | — |
| FrontierMath (Feb 2025 set) | 19.7% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |
Knowledge Grok 4 leads
Grok 4: 53.8 (#55), MiMo-V2.5-Pro: 42.2 (#98)
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Expert | 1415 | 1503 |
| GPQA Diamond | 87% | — |
| MMLU-Pro | 85.1% | — |
| Confabulations | 12.4% | — |
| GPQA (HELM) | 72.7% | — |
Multimodal Not comparable
Grok 4: 33.7 (#94), MiMo-V2.5-Pro: —
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Vision | 1210 | — |
| GeoBench | 45% | — |
Multilingual MiMo-V2.5-Pro leads
Grok 4: 51.8 (#103), MiMo-V2.5-Pro: 55.1 (#34)
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Non-English | 1403 | 1449 |
| LMArena Chinese | 1427 | 1507 |
| LMArena French | 1418 | 1488 |
| LMArena German | 1429 | 1458 |
| LMArena Japanese | 1394 | 1412 |
| LMArena Korean | 1377 | 1437 |
| LMArena Russian | 1410 | 1450 |
| LMArena Spanish | 1420 | 1471 |
Instruction Following Grok 4 leads
Grok 4: 79.2 (#5), MiMo-V2.5-Pro: 77.5 (#21)
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Instruction Following | 1387 | 1477 |
| IFEval | 94.9% | — |
Long Context Grok 4 leads
Grok 4: 63.1 (#4), MiMo-V2.5-Pro: 45.4 (#37)
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Longer Query | 1409 | 1483 |
| Fiction.LiveBench | 94.4% | — |
Writing & Preference MiMo-V2.5-Pro leads
Grok 4: 58.5 (#116), MiMo-V2.5-Pro: 65.3 (#49)
| Benchmark | Grok 4 | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Text | 1411 | 1465 |
| LMArena Creative Writing | 1397 | 1440 |
| LMArena Multi-Turn | 1416 | 1477 |
| Short-Story Creative Writing | 76.9% | — |
| EQ-Bench Creative Writing | — | 1493 |
| WildBench | 79.7% | — |
| EQ-Bench 4 | — | 1208 |
Frequently asked questions
Is Grok 4 better than MiMo-V2.5-Pro?
Grok 4 is the stronger model overall, scoring 48.1 to 45.2 on the Noometry Index.
Is Grok 4 or MiMo-V2.5-Pro better for coding?
Grok 4 scores higher on coding benchmarks: 50.3 versus 47.4 in the Noometry coding category.
How many benchmarks do Grok 4 and MiMo-V2.5-Pro share?
17 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and MiMo-V2.5-Pro has 27.