# Amazon Nova Pro vs C4ai Aya Expanse 8b

> C4ai Aya Expanse 8b is the stronger model overall, scoring 34.9 to 31.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-pro-vs-c4ai-aya-expanse-8b
- Last updated: 2026-10-12
- Shared benchmarks: 15

## Summary

- They share 15 benchmarks with published results for both. Amazon Nova Pro scores higher in 5 categories and C4ai Aya Expanse 8b in 3 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where C4ai Aya Expanse 8b leads 33.6 to 27.4.
- C4ai Aya Expanse 8b has downloadable open weights; the other is API-only.

## Snapshot

| | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| Provider | Amazon | Cohere |
| Noometry Index | 31.0 | 34.9 |
| Rank | 281 | 229 |
| Context | 300K | — |
| Input $/M | $0.80 | — |
| Output $/M | $3.20 | — |
| Weights | Proprietary | Open |

## Coding

- Amazon Nova Pro: 35.1 (#229)
- C4ai Aya Expanse 8b: 33.8 (#252)

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| LMArena Coding | 1270 | 1160 |
| LiveBench Coding | 38.1% | — |

## Agentic & Tool Use

- Amazon Nova Pro: 16.7 (#147)
- C4ai Aya Expanse 8b: —

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| Berkeley Function Calling Leaderboard | 25% | — |
| TheAgentCompany | 1.7% | — |

## Reasoning

- Amazon Nova Pro: 20.0 (#243)
- C4ai Aya Expanse 8b: 22.4 (#197)

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| LMArena Hard Prompts | 1246 | 1156 |
| LiveBench Reasoning | 32.6% | — |
| LiveBench Data Analysis | 48.3% | — |
| Epoch Capabilities Index | 123.8 | — |
| LiveBench | 43.5% | — |

## Math

- Amazon Nova Pro: 28.5 (#243)
- C4ai Aya Expanse 8b: 33.3 (#203)

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| LMArena Math | 1252 | 1168 |
| Omni-MATH | 24.2% | — |
| LiveBench Math | 38% | — |

## Knowledge

- Amazon Nova Pro: 27.4 (#250)
- C4ai Aya Expanse 8b: 33.6 (#201)

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| Vectara Hallucination Rate | 5.1% | 9.5% |
| LMArena Expert | 1211 | 1153 |
| Humanity's Last Exam | 4.4% | — |
| MMLU-Pro | 67.3% | — |
| Confabulations | 30.1% | — |
| GPQA (HELM) | 44.6% | — |
| MMLU | 82% | — |

## Multimodal

- Amazon Nova Pro: 25.0 (#126)
- C4ai Aya Expanse 8b: —

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| LMArena Vision | 980 | — |

## Multilingual

- Amazon Nova Pro: 39.7 (#223)
- C4ai Aya Expanse 8b: 36.1 (#242)

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| LMArena Non-English | 1234 | 1180 |
| LMArena Chinese | 1244 | 1181 |
| LMArena German | 1243 | 1188 |
| LMArena Japanese | 1200 | 1120 |
| LMArena Russian | 1240 | 1197 |
| LMArena French | 1271 | — |
| LMArena Korean | 1203 | — |
| LMArena Spanish | 1182 | — |

## Instruction Following

- Amazon Nova Pro: 64.9 (#226)
- C4ai Aya Expanse 8b: 60.1 (#253)

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| LMArena Instruction Following | 1235 | 1155 |
| LiveBench Instruction Following | 67.1% | — |
| IFEval | 81.5% | — |

## Long Context

- Amazon Nova Pro: 38.1 (#205)
- C4ai Aya Expanse 8b: 36.1 (#236)

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| LMArena Longer Query | 1255 | 1191 |

## Writing & Preference

- Amazon Nova Pro: 43.9 (#226)
- C4ai Aya Expanse 8b: 39.0 (#250)

| Benchmark | Amazon Nova Pro | C4ai Aya Expanse 8b |
|---|---|---|
| LMArena Text | 1259 | 1185 |
| LMArena Creative Writing | 1212 | 1168 |
| LMArena Multi-Turn | 1246 | 1160 |
| Short-Story Creative Writing | 60.5% | — |
| WildBench | 77.7% | — |
| LiveBench Language | 37% | — |

## FAQ

### Is Amazon Nova Pro better than C4ai Aya Expanse 8b?

C4ai Aya Expanse 8b is the stronger model overall, scoring 34.9 to 31.0 on the Noometry Index.

### Is Amazon Nova Pro or C4ai Aya Expanse 8b better for coding?

Amazon Nova Pro scores higher on coding benchmarks: 35.1 versus 33.8 in the Noometry coding category.

### How many benchmarks do Amazon Nova Pro and C4ai Aya Expanse 8b share?

15 benchmarks have published results for both models. Amazon Nova Pro has 38 scored results on Noometry and C4ai Aya Expanse 8b has 15.