# C4ai Aya Expanse 8b vs Command R+

> C4ai Aya Expanse 8b is the stronger model overall, scoring 34.9 to 32.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/c4ai-aya-expanse-8b-vs-command-r-plus
- Last updated: 2026-10-10
- Shared benchmarks: 15

## Summary

- They share 15 benchmarks with published results for both. C4ai Aya Expanse 8b scores higher in 4 categories and Command R+ in 4 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where C4ai Aya Expanse 8b leads 22.4 to 9.2.

## Snapshot

| | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| Provider | Cohere | Cohere |
| Noometry Index | 34.9 | 32.4 |
| Rank | 229 | 257 |
| Context | — | 128K |
| Input $/M | — | $2.50 |
| Output $/M | — | $10 |
| Weights | Open | Open |

## Coding

- C4ai Aya Expanse 8b: 33.8 (#252)
- Command R+: 29.1 (#309)

| Benchmark | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| LMArena Coding | 1160 | 1187 |
| BigCodeBench Instruct | — | 33.8% |
| LiveBench Coding | — | 19.1% |
| BigCodeBench Complete | — | 41.9% |
| HumanEval+ | — | 56.7% |
| MBPP+ | — | 63.5% |

## Reasoning

- C4ai Aya Expanse 8b: 22.4 (#197)
- Command R+: 9.2 (#344)

| Benchmark | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| LMArena Hard Prompts | 1156 | 1186 |
| SimpleBench | — | 17.4% |
| LiveBench Reasoning | — | 24.8% |
| DTBench | — | 54.9% |
| LiveBench Data Analysis | — | 38.1% |
| LMCA | — | 5% |
| Epoch Capabilities Index | — | 119.34 |
| LiveBench | — | 31.8% |

## Math

- C4ai Aya Expanse 8b: 33.3 (#203)
- Command R+: 28.9 (#242)

| Benchmark | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| LMArena Math | 1168 | 1188 |
| LiveBench Math | — | 21.3% |

## Knowledge

- C4ai Aya Expanse 8b: 33.6 (#201)
- Command R+: 36.4 (#169)

| Benchmark | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| Vectara Hallucination Rate | 9.5% | 6.9% |
| LMArena Expert | 1153 | 1174 |
| MMLU | — | 69.4% |

## Multilingual

- C4ai Aya Expanse 8b: 36.1 (#242)
- Command R+: 38.6 (#227)

| Benchmark | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| LMArena Non-English | 1180 | 1216 |
| LMArena Chinese | 1181 | 1226 |
| LMArena German | 1188 | 1216 |
| LMArena Japanese | 1120 | 1166 |
| LMArena Russian | 1197 | 1227 |
| LMArena French | — | 1209 |
| LMArena Korean | — | 1138 |
| LMArena Spanish | — | 1189 |

## Instruction Following

- C4ai Aya Expanse 8b: 60.1 (#253)
- Command R+: 60.0 (#254)

| Benchmark | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| LMArena Instruction Following | 1155 | 1197 |
| LiveBench Instruction Following | — | 57.6% |

## Long Context

- C4ai Aya Expanse 8b: 36.1 (#236)
- Command R+: 37.3 (#219)

| Benchmark | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| LMArena Longer Query | 1191 | 1230 |

## Writing & Preference

- C4ai Aya Expanse 8b: 39.0 (#250)
- Command R+: 43.5 (#228)

| Benchmark | C4ai Aya Expanse 8b | Command R+ |
|---|---|---|
| LMArena Text | 1185 | 1229 |
| LMArena Creative Writing | 1168 | 1235 |
| LMArena Multi-Turn | 1160 | 1213 |
| LiveBench Language | — | 29.7% |

## FAQ

### Is C4ai Aya Expanse 8b better than Command R+?

C4ai Aya Expanse 8b is the stronger model overall, scoring 34.9 to 32.4 on the Noometry Index.

### Is C4ai Aya Expanse 8b or Command R+ better for coding?

C4ai Aya Expanse 8b scores higher on coding benchmarks: 33.8 versus 29.1 in the Noometry coding category.

### How many benchmarks do C4ai Aya Expanse 8b and Command R+ share?

15 benchmarks have published results for both models. C4ai Aya Expanse 8b has 15 scored results on Noometry and Command R+ has 34.