# Grok 4.3 vs MiMo-V2.5

> Grok 4.3 and MiMo-V2.5 score almost the same on the Noometry Index (43.8 vs 43.4), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/grok-4-3-vs-mimo-v2-5
- Last updated: 2026-10-11
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. Grok 4.3 scores higher in 3 categories and MiMo-V2.5 in 6 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 40.8.
- The biggest single-benchmark swing is ProofBench: 11% for Grok 4.3 and 16% for MiMo-V2.5.
- MiMo-V2.5 is cheaper at $0.14 / $0.28 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
- MiMo-V2.5 accepts more context: 1.05M tokens versus 1M.
- MiMo-V2.5 has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| Provider | xAI | Xiaomi |
| Noometry Index | 43.8 | 43.4 |
| Rank | 86 | 93 |
| Context | 1M | 1.05M |
| Input $/M | $1.25 | $0.14 |
| Output $/M | $2.50 | $0.28 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.3: 41.6 (#121)
- MiMo-V2.5: 43.9 (#81)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| LMArena WebDev | 1357 | 1438 |
| SciCode | 47.3% | 43.1% |
| LMArena Coding | 1415 | 1469 |
| ALE-Bench | 944.17 | 513.95 |
| WeirdML | 49.9% | — |

## Agentic & Tool Use

- Grok 4.3: 27.7 (#99)
- MiMo-V2.5: —

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| GDP.pdf | 8% | — |
| LMArena Search | 1165 | — |
| Vending-Bench 2 | 35.26 | — |

## Reasoning

- Grok 4.3: 35.9 (#68)
- MiMo-V2.5: 28.6 (#101)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| CritPt | 8% | 3.7% |
| LMArena Hard Prompts | 1396 | 1450 |
| NYT Connections (extended) | 55.2% | — |
| Chess Puzzles | 25% | — |
| DTBench | 90.7% | — |
| LMCA | 38.3% | — |
| Epoch Capabilities Index | 149.16 | — |
| ForecastBench | 60.3 | — |

## Math

- Grok 4.3: 46.0 (#74)
- MiMo-V2.5: 36.8 (#163)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| ProofBench | 11% | 16% |
| LMArena Math | 1388 | 1436 |
| FrontierMath (Tiers 1-3) | 42.8% | — |
| FrontierMath Tier 4 | 14.6% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |

## Knowledge

- Grok 4.3: 52.5 (#62)
- MiMo-V2.5: 40.8 (#115)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| LMArena Expert | 1385 | 1460 |
| GPQA Diamond | 88.8% | — |
| SimpleQA Verified | 33.2% | — |

## Multimodal

- Grok 4.3: 31.6 (#104)
- MiMo-V2.5: 39.8 (#54)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| LMArena Vision | 1229 | 1247 |
| Blueprint-Bench 2 | 0% | — |

## Multilingual

- Grok 4.3: 50.5 (#120)
- MiMo-V2.5: 51.9 (#99)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| LMArena Non-English | 1385 | 1404 |
| LMArena Chinese | 1422 | 1468 |
| LMArena French | 1412 | 1447 |
| LMArena German | 1395 | 1421 |
| LMArena Japanese | 1379 | 1306 |
| LMArena Korean | 1356 | 1363 |
| LMArena Russian | 1399 | 1395 |
| LMArena Spanish | 1398 | 1416 |

## Instruction Following

- Grok 4.3: 72.1 (#140)
- MiMo-V2.5: 75.5 (#60)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| LMArena Instruction Following | 1366 | 1434 |

## Long Context

- Grok 4.3: 42.5 (#123)
- MiMo-V2.5: 44.2 (#73)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| LMArena Longer Query | 1393 | 1445 |

## Writing & Preference

- Grok 4.3: 58.5 (#118)
- MiMo-V2.5: 61.6 (#86)

| Benchmark | Grok 4.3 | MiMo-V2.5 |
|---|---|---|
| LMArena Text | 1397 | 1428 |
| LMArena Creative Writing | 1380 | 1393 |
| LMArena Multi-Turn | 1406 | 1445 |
| EQ-Bench 4 | 1075 | — |

## FAQ

### Is Grok 4.3 better than MiMo-V2.5?

Grok 4.3 and MiMo-V2.5 score almost the same on the Noometry Index (43.8 vs 43.4), so choose on price, context window or the category you care about most.

### Which is cheaper, Grok 4.3 or MiMo-V2.5?

MiMo-V2.5 is cheaper. It lists at $0.14 per million input tokens and $0.28 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.

### Is Grok 4.3 or MiMo-V2.5 better for coding?

MiMo-V2.5 scores higher on coding benchmarks: 43.9 versus 41.6 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.5 does, with 1.05M tokens against 1M.

### How many benchmarks do Grok 4.3 and MiMo-V2.5 share?

23 benchmarks have published results for both models. Grok 4.3 has 40 scored results on Noometry and MiMo-V2.5 has 23.