# Command R+ vs Grok 4 Fast

> Grok 4 Fast is the stronger model overall, scoring 39.4 to 32.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/command-r-plus-vs-grok-4-fast
- Last updated: 2026-10-11
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. Command R+ scores higher in 1 category and Grok 4 Fast in 7 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 37.3.
- The biggest single-benchmark swing is DTBench: 54.9% for Command R+ and 82.7% for Grok 4 Fast.
- Command R+ has downloadable open weights; the other is API-only.

## Snapshot

| | Command R+ | Grok 4 Fast |
|---|---|---|
| Provider | Cohere | xAI |
| Noometry Index | 32.4 | 39.4 |
| Rank | 257 | 167 |
| Context | 128K | — |
| Input $/M | $2.50 | — |
| Output $/M | $10 | — |
| Weights | Open | Proprietary |

## Coding

- Command R+: 29.1 (#309)
- Grok 4 Fast: 32.5 (#271)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1187 | 1429 |
| LMArena WebDev | — | 1159 |
| WeirdML | — | 42.9% |
| BigCodeBench Instruct | 33.8% | — |
| LiveBench Coding | 19.1% | — |
| BigCodeBench Complete | 41.9% | — |
| HumanEval+ | 56.7% | — |
| MBPP+ | 63.5% | — |

## Agentic & Tool Use

- Command R+: —
- Grok 4 Fast: 29.5 (#86)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |

## Reasoning

- Command R+: 9.2 (#344)
- Grok 4 Fast: 22.2 (#201)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| LMArena Hard Prompts | 1186 | 1412 |
| DTBench | 54.9% | 82.7% |
| Epoch Capabilities Index | 119.34 | 144.2 |
| ARC-AGI-2 | — | 5.3% |
| SimpleBench | 17.4% | — |
| Kagi LLM Benchmark | — | 66.1% |
| ARC-AGI-1 | — | 48.5% |
| LiveBench Reasoning | 24.8% | — |
| LiveBench Data Analysis | 38.1% | — |
| LMCA | 5% | — |
| ForecastBench | — | 60.5 |
| LiveBench | 31.8% | — |

## Math

- Command R+: 28.9 (#242)
- Grok 4 Fast: 38.9 (#123)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1188 | 1419 |
| LiveBench Math | 21.3% | — |

## Knowledge

- Command R+: 36.4 (#169)
- Grok 4 Fast: 32.0 (#214)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | 6.9% | 19.7% |
| LMArena Expert | 1174 | 1411 |
| MMLU | 69.4% | — |

## Multilingual

- Command R+: 38.6 (#227)
- Grok 4 Fast: 51.3 (#111)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1216 | 1396 |
| LMArena Chinese | 1226 | 1457 |
| LMArena French | 1209 | 1431 |
| LMArena German | 1216 | 1383 |
| LMArena Japanese | 1166 | 1352 |
| LMArena Korean | 1138 | 1357 |
| LMArena Russian | 1227 | 1389 |
| LMArena Spanish | 1189 | 1415 |

## Instruction Following

- Command R+: 60.0 (#254)
- Grok 4 Fast: 73.2 (#121)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1197 | 1387 |
| LiveBench Instruction Following | 57.6% | — |

## Long Context

- Command R+: 37.3 (#219)
- Grok 4 Fast: 63.2 (#3)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1230 | 1415 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- Command R+: 43.5 (#228)
- Grok 4 Fast: 60.0 (#102)

| Benchmark | Command R+ | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1229 | 1407 |
| LMArena Creative Writing | 1235 | 1387 |
| LMArena Multi-Turn | 1213 | 1414 |
| LiveBench Language | 29.7% | — |

## FAQ

### Is Command R+ better than Grok 4 Fast?

Grok 4 Fast is the stronger model overall, scoring 39.4 to 32.4 on the Noometry Index.

### Is Command R+ or Grok 4 Fast better for coding?

Grok 4 Fast scores higher on coding benchmarks: 32.5 versus 29.1 in the Noometry coding category.

### How many benchmarks do Command R+ and Grok 4 Fast share?

20 benchmarks have published results for both models. Command R+ has 34 scored results on Noometry and Grok 4 Fast has 30.