# Kimi K2.5 Instant vs Mistral Small

> Kimi K2.5 Instant is the stronger model overall, scoring 42.9 to 33.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/kimi-k2-5-instant-vs-mistral-small
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. Kimi K2.5 Instant scores higher in 9 categories and Mistral Small in 0 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K2.5 Instant leads 36.6 to 15.4.

## Snapshot

| | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| Provider | Moonshot AI | Mistral AI |
| Noometry Index | 42.9 | 33.1 |
| Rank | 92 | 238 |
| Context | — | 256K |
| Input $/M | — | $0.15 |
| Output $/M | — | $0.60 |
| Weights | Open | Open |

## Coding

- Kimi K2.5 Instant: 42.3 (#95)
- Mistral Small: 33.5 (#242)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Coding | 1483 | 1363 |
| LMArena WebDev | 1404 | — |
| SciCode | — | 26.5% |
| BigCodeBench Instruct | — | 36.1% |
| LiveBench Coding | — | 36.2% |
| BigCodeBench Complete | — | 46.6% |
| ALE-Bench | — | 497.62 |

## Agentic & Tool Use

- Kimi K2.5 Instant: —
- Mistral Small: 27.9 (#87)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 37.1% |

## Reasoning

- Kimi K2.5 Instant: 28.5 (#88)
- Mistral Small: 19.3 (#238)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1336 |
| Kagi LLM Benchmark | — | 37.8% |
| CritPt | — | 0% |
| LiveBench Reasoning | — | 44.8% |
| DTBench | — | 70.9% |
| LiveBench Data Analysis | — | 53.7% |
| LMCA | — | 20.6% |
| LiveBench | — | 44% |

## Math

- Kimi K2.5 Instant: 36.6 (#105)
- Mistral Small: 15.4 (#287)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Math | 1443 | 1341 |
| OTIS Mock AIME 2024-2025 | — | 5.8% |
| LiveBench Math | — | 39.9% |
| MATH Level 5 | — | 46.8% |

## Knowledge

- Kimi K2.5 Instant: 39.5 (#121)
- Mistral Small: 30.9 (#214)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Expert | 1438 | 1293 |
| GPQA Diamond | — | 47.5% |
| Vectara Hallucination Rate | — | 5.1% |
| MMLU | — | 68.7% |

## Multimodal

- Kimi K2.5 Instant: 39.5 (#47)
- Mistral Small: 32.9 (#91)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Vision | 1254 | 1142 |

## Multilingual

- Kimi K2.5 Instant: 52.2 (#89)
- Mistral Small: 45.7 (#164)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Non-English | 1406 | 1315 |
| LMArena Chinese | 1450 | 1342 |
| LMArena French | 1403 | 1337 |
| LMArena German | 1413 | 1341 |
| LMArena Korean | 1378 | 1260 |
| LMArena Russian | 1404 | 1324 |
| LMArena Spanish | 1448 | 1346 |
| LMArena Japanese | — | 1275 |

## Instruction Following

- Kimi K2.5 Instant: 75.5 (#61)
- Mistral Small: 66.6 (#204)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Instruction Following | 1430 | 1310 |
| LiveBench Instruction Following | — | 63.7% |

## Long Context

- Kimi K2.5 Instant: 43.8 (#82)
- Mistral Small: 40.4 (#151)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Longer Query | 1435 | 1327 |

## Writing & Preference

- Kimi K2.5 Instant: 60.8 (#91)
- Mistral Small: 52.6 (#165)

| Benchmark | Kimi K2.5 Instant | Mistral Small |
|---|---|---|
| LMArena Text | 1420 | 1338 |
| LMArena Creative Writing | 1379 | 1304 |
| LMArena Multi-Turn | 1427 | 1344 |
| LiveBench Language | — | 30.5% |

## FAQ

### Is Kimi K2.5 Instant better than Mistral Small?

Kimi K2.5 Instant is the stronger model overall, scoring 42.9 to 33.1 on the Noometry Index.

### Is Kimi K2.5 Instant or Mistral Small better for coding?

Kimi K2.5 Instant scores higher on coding benchmarks: 42.3 versus 33.5 in the Noometry coding category.

### How many benchmarks do Kimi K2.5 Instant and Mistral Small share?

17 benchmarks have published results for both models. Kimi K2.5 Instant has 18 scored results on Noometry and Mistral Small has 39.