# Kimi K2.5 Instant vs Mistral Small 3

> Kimi K2.5 Instant is the stronger model overall, scoring 42.9 to 30.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/kimi-k2-5-instant-vs-mistral-small-3
- Last updated: 2026-10-10
- Shared benchmarks: 15

## Summary

- They share 15 benchmarks with published results for both. Kimi K2.5 Instant scores higher in 8 categories and Mistral Small 3 in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Kimi K2.5 Instant leads 60.8 to 32.4.

## Snapshot

| | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| Provider | Moonshot AI | Mistral AI |
| Noometry Index | 42.9 | 30.9 |
| Rank | 92 | 268 |
| Context | — | 33K |
| Input $/M | — | $0.05 |
| Output $/M | — | $0.08 |
| Weights | Open | Open |

## Coding

- Kimi K2.5 Instant: 42.3 (#95)
- Mistral Small 3: 36.0 (#203)

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Coding | 1483 | 1246 |
| LMArena WebDev | 1404 | — |
| BigCodeBench Instruct | — | 45.3% |
| BigCodeBench Complete | — | 50.4% |

## Reasoning

- Kimi K2.5 Instant: 28.5 (#88)
- Mistral Small 3: 18.2 (#269)

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1233 |
| Chess Puzzles | — | 0% |
| Epoch Capabilities Index | — | 127.06 |

## Math

- Kimi K2.5 Instant: 36.6 (#105)
- Mistral Small 3: 15.3 (#290)

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Math | 1443 | 1240 |
| OTIS Mock AIME 2024-2025 | — | 6.7% |

## Knowledge

- Kimi K2.5 Instant: 39.5 (#121)
- Mistral Small 3: 25.0 (#258)

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Expert | 1438 | 1202 |
| GPQA Diamond | — | 47.3% |
| Confabulations | — | 25.2% |

## Multimodal

- Kimi K2.5 Instant: 39.5 (#47)
- Mistral Small 3: —

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Vision | 1254 | — |

## Multilingual

- Kimi K2.5 Instant: 52.2 (#89)
- Mistral Small 3: 37.5 (#231)

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Non-English | 1406 | 1198 |
| LMArena Chinese | 1450 | 1204 |
| LMArena French | 1403 | 1202 |
| LMArena German | 1413 | 1211 |
| LMArena Korean | 1378 | 1188 |
| LMArena Russian | 1404 | 1216 |
| LMArena Japanese | — | 1111 |
| LMArena Spanish | 1448 | — |

## Instruction Following

- Kimi K2.5 Instant: 75.5 (#61)
- Mistral Small 3: 63.9 (#224)

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Instruction Following | 1430 | 1214 |

## Long Context

- Kimi K2.5 Instant: 43.8 (#82)
- Mistral Small 3: 37.8 (#206)

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Longer Query | 1435 | 1246 |

## Writing & Preference

- Kimi K2.5 Instant: 60.8 (#91)
- Mistral Small 3: 32.4 (#275)

| Benchmark | Kimi K2.5 Instant | Mistral Small 3 |
|---|---|---|
| LMArena Text | 1420 | 1234 |
| LMArena Creative Writing | 1379 | 1195 |
| LMArena Multi-Turn | 1427 | 1217 |
| EQ-Bench Creative Writing | — | 707 |

## FAQ

### Is Kimi K2.5 Instant better than Mistral Small 3?

Kimi K2.5 Instant is the stronger model overall, scoring 42.9 to 30.9 on the Noometry Index.

### Is Kimi K2.5 Instant or Mistral Small 3 better for coding?

Kimi K2.5 Instant scores higher on coding benchmarks: 42.3 versus 36.0 in the Noometry coding category.

### How many benchmarks do Kimi K2.5 Instant and Mistral Small 3 share?

15 benchmarks have published results for both models. Kimi K2.5 Instant has 18 scored results on Noometry and Mistral Small 3 has 24.