# Amazon Nova Micro vs C4ai Aya Expanse 32b

> C4ai Aya Expanse 32b is the stronger model overall, scoring 35.9 to 30.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/amazon-nova-micro-vs-c4ai-aya-expanse-32b
- Last updated: 2026-10-12
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. Amazon Nova Micro scores higher in 0 categories and C4ai Aya Expanse 32b in 8 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where C4ai Aya Expanse 32b leads 34.0 to 26.9.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 5.5% for Amazon Nova Micro and 10.9% for C4ai Aya Expanse 32b.
- C4ai Aya Expanse 32b has downloadable open weights; the other is API-only.

## Snapshot

| | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| Provider | Amazon | Cohere |
| Noometry Index | 30.4 | 35.9 |
| Rank | 294 | 221 |
| Context | 128K | 128K |
| Input $/M | $0.035 | — |
| Output $/M | $0.14 | — |
| Weights | Proprietary | Open |

## Coding

- Amazon Nova Micro: 30.5 (#295)
- C4ai Aya Expanse 32b: 34.8 (#231)

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| LMArena Coding | 1218 | 1197 |
| LiveBench Coding | 20.2% | — |

## Agentic & Tool Use

- Amazon Nova Micro: 22.1 (#132)
- C4ai Aya Expanse 32b: —

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| Berkeley Function Calling Leaderboard | 22.3% | — |

## Reasoning

- Amazon Nova Micro: 17.4 (#294)
- C4ai Aya Expanse 32b: 23.3 (#180)

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| LMArena Hard Prompts | 1191 | 1193 |
| LiveBench Reasoning | 25.1% | — |
| LiveBench Data Analysis | 34% | — |
| LiveBench | 29.6% | — |

## Math

- Amazon Nova Micro: 26.9 (#254)
- C4ai Aya Expanse 32b: 34.0 (#197)

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| LMArena Math | 1206 | 1200 |
| Omni-MATH | 21.4% | — |
| LiveBench Math | 34.5% | — |

## Knowledge

- Amazon Nova Micro: 29.6 (#237)
- C4ai Aya Expanse 32b: 33.2 (#206)

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| Vectara Hallucination Rate | 5.5% | 10.9% |
| LMArena Expert | 1184 | 1182 |
| MMLU-Pro | 51.1% | — |
| GPQA (HELM) | 38.3% | — |
| MMLU | 70.8% | — |

## Multilingual

- Amazon Nova Micro: 36.5 (#239)
- C4ai Aya Expanse 32b: 38.4 (#230)

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| LMArena Non-English | 1186 | 1213 |
| LMArena Chinese | 1209 | 1211 |
| LMArena French | 1238 | 1248 |
| LMArena German | 1192 | 1199 |
| LMArena Japanese | 1154 | 1163 |
| LMArena Korean | 1150 | 1158 |
| LMArena Russian | 1185 | 1227 |
| LMArena Spanish | 1225 | 1193 |

## Instruction Following

- Amazon Nova Micro: 56.3 (#272)
- C4ai Aya Expanse 32b: 62.6 (#237)

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| LMArena Instruction Following | 1174 | 1196 |
| LiveBench Instruction Following | 48% | — |
| IFEval | 76% | — |

## Long Context

- Amazon Nova Micro: 36.5 (#229)
- C4ai Aya Expanse 32b: 37.2 (#220)

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| LMArena Longer Query | 1205 | 1228 |

## Writing & Preference

- Amazon Nova Micro: 39.5 (#247)
- C4ai Aya Expanse 32b: 42.2 (#235)

| Benchmark | Amazon Nova Micro | C4ai Aya Expanse 32b |
|---|---|---|
| LMArena Text | 1208 | 1224 |
| LMArena Creative Writing | 1172 | 1200 |
| LMArena Multi-Turn | 1178 | 1190 |
| WildBench | 74.3% | — |
| LiveBench Language | 15.8% | — |

## FAQ

### Is Amazon Nova Micro better than C4ai Aya Expanse 32b?

C4ai Aya Expanse 32b is the stronger model overall, scoring 35.9 to 30.4 on the Noometry Index.

### Is Amazon Nova Micro or C4ai Aya Expanse 32b better for coding?

C4ai Aya Expanse 32b scores higher on coding benchmarks: 34.8 versus 30.5 in the Noometry coding category.

### Which has the bigger context window?

Both accept 128K tokens.

### How many benchmarks do Amazon Nova Micro and C4ai Aya Expanse 32b share?

18 benchmarks have published results for both models. Amazon Nova Micro has 32 scored results on Noometry and C4ai Aya Expanse 32b has 18.