# C4ai Aya Expanse 8b vs Kimi K2.7 Code

> Kimi K2.7 Code is the stronger model overall, scoring 43.0 to 34.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/c4ai-aya-expanse-8b-vs-kimi-k2-7-code
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where Kimi K2.7 Code leads 52.6 to 30.8.
- Kimi K2.7 Code accepts more context: 262K tokens versus 8K.

## Snapshot

| | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| Provider | Cohere | Moonshot AI |
| Noometry Index | 34.3 | 43.0 |
| Rank | 227 | 90 |
| Context | 8K | 262K |
| Input $/M | — | $0.95 |
| Output $/M | — | $4 |
| Weights | Open | Open |

## Coding

- C4ai Aya Expanse 8b: 33.2 (#252)
- Kimi K2.7 Code: 42.4 (#92)

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| DeepSWE | — | 30.5% |
| FrontierCode | — | 30.1% |
| LMArena WebDev | — | 1473 |
| SciCode | — | 47.5% |
| WeirdML | — | 54.1% |
| LMArena Coding | 1161 | — |
| ALE-Bench | — | 886.23 |

## Agentic & Tool Use

- C4ai Aya Expanse 8b: —
- Kimi K2.7 Code: 23.9 (#115)

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| APEX-Agents | — | 37.6% |
| GBAEval | — | 0.9% |
| Vending-Bench 2 | — | 5,083 |

## Reasoning

- C4ai Aya Expanse 8b: 21.4 (#198)
- Kimi K2.7 Code: 38.2 (#56)

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| SimpleBench | — | 57.9% |
| CritPt | — | 10% |
| Chess Puzzles | — | 21% |
| LMArena Hard Prompts | 1156 | — |
| Surface Evolver Bench | — | 48.8% |
| Epoch Capabilities Index | — | 150.01 |

## Math

- C4ai Aya Expanse 8b: 30.8 (#204)
- Kimi K2.7 Code: 52.6 (#39)

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 54% |
| FrontierMath Tier 4 | — | 12.2% |
| OTIS Mock AIME 2024-2025 | — | 95.6% |
| LMArena Math | 1168 | — |

## Knowledge

- C4ai Aya Expanse 8b: 33.0 (#197)
- Kimi K2.7 Code: 53.6 (#51)

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| GPQA Diamond | — | 87.9% |
| SimpleQA Verified | — | 36.5% |
| Vectara Hallucination Rate | 9.5% | — |
| LMArena Expert | 1153 | — |

## Multilingual

- C4ai Aya Expanse 8b: 36.3 (#237)
- Kimi K2.7 Code: —

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| LMArena Non-English | 1180 | — |
| LMArena Chinese | 1181 | — |
| LMArena German | 1188 | — |
| LMArena Japanese | 1120 | — |
| LMArena Russian | 1197 | — |

## Instruction Following

- C4ai Aya Expanse 8b: 60.4 (#248)
- Kimi K2.7 Code: —

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| LMArena Instruction Following | 1155 | — |

## Long Context

- C4ai Aya Expanse 8b: 36.1 (#231)
- Kimi K2.7 Code: —

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| LMArena Longer Query | 1192 | — |

## Writing & Preference

- C4ai Aya Expanse 8b: 39.2 (#245)
- Kimi K2.7 Code: —

| Benchmark | C4ai Aya Expanse 8b | Kimi K2.7 Code |
|---|---|---|
| LMArena Text | 1185 | — |
| LMArena Creative Writing | 1168 | — |
| LMArena Multi-Turn | 1160 | — |

## FAQ

### Is C4ai Aya Expanse 8b better than Kimi K2.7 Code?

Kimi K2.7 Code is the stronger model overall, scoring 43.0 to 34.3 on the Noometry Index.

### Is C4ai Aya Expanse 8b or Kimi K2.7 Code better for coding?

Kimi K2.7 Code scores higher on coding benchmarks: 42.4 versus 33.2 in the Noometry coding category.

### Which has the bigger context window?

Kimi K2.7 Code does, with 262K tokens against 8K.

### How many benchmarks do C4ai Aya Expanse 8b and Kimi K2.7 Code share?

0 benchmarks have published results for both models. C4ai Aya Expanse 8b has 15 scored results on Noometry and Kimi K2.7 Code has 19.