# Grok 4 Heavy vs MiMo-V2.6-Pro

> MiMo-V2.6-Pro has enough public results to be ranked (#49); Grok 4 Heavy does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/grok-4-heavy-vs-mimo-v2-6-pro
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- MiMo-V2.6-Pro has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| Provider | xAI | Xiaomi |
| Noometry Index | — | 50.3 |
| Rank | — | 49 |
| Context | — | 1.05M |
| Input $/M | — | $0.43 |
| Output $/M | — | $0.87 |
| Weights | Proprietary | Open |

## Coding

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 55.5 (#23)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| LMArena WebDev | — | 1629 |
| SciCode | — | 60.9% |
| LMArena Coding | — | 1534 |
| ALE-Bench | — | 1,158 |

## Agentic & Tool Use

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 37.5 (#35)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| APEX-Agents | — | 59.5% |

## Reasoning

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 43.1 (#50)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| CritPt | — | 26.6% |
| LMArena Hard Prompts | — | 1512 |

## Math

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 54.5 (#45)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| ProofBench | — | 70% |
| LMArena Math | — | 1494 |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 43.5 (#92)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Expert | — | 1543 |

## Multimodal

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 40.8 (#43)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Vision | — | 1264 |

## Multilingual

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 56.9 (#14)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Non-English | — | 1474 |
| LMArena Chinese | — | 1529 |
| LMArena Russian | — | 1480 |

## Instruction Following

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 78.2 (#12)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Instruction Following | — | 1493 |

## Long Context

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 46.0 (#27)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Longer Query | — | 1501 |

## Writing & Preference

- Grok 4 Heavy: —
- MiMo-V2.6-Pro: 66.8 (#33)

| Benchmark | Grok 4 Heavy | MiMo-V2.6-Pro |
|---|---|---|
| LMArena Text | — | 1492 |
| LMArena Creative Writing | — | 1468 |
| LMArena Multi-Turn | — | 1464 |

## FAQ

### Is Grok 4 Heavy better than MiMo-V2.6-Pro?

MiMo-V2.6-Pro has enough public results to be ranked (#49); Grok 4 Heavy does not yet, so treat this comparison as directional.

### How many benchmarks do Grok 4 Heavy and MiMo-V2.6-Pro share?

0 benchmarks have published results for both models. Grok 4 Heavy has 1 scored results on Noometry and MiMo-V2.6-Pro has 19.