# Kimi K2.5 Instant vs Sonar

> Kimi K2.5 Instant is the stronger model overall, scoring 42.9 to 37.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/kimi-k2-5-instant-vs-sonar
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in writing & preference, where Kimi K2.5 Instant leads 60.8 to 52.6.
- Kimi K2.5 Instant has downloadable open weights; the other is API-only.

## Snapshot

| | Kimi K2.5 Instant | Sonar |
|---|---|---|
| Provider | Moonshot AI | Perplexity |
| Noometry Index | 42.9 | 37.8 |
| Rank | 92 | 184 |
| Context | — | 128K |
| Input $/M | — | $1 |
| Output $/M | — | $1 |
| Weights | Open | Proprietary |

## Coding

- Kimi K2.5 Instant: 42.3 (#95)
- Sonar: 35.1 (#217)

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LMArena WebDev | 1404 | — |
| LiveBench Coding | — | 35.1% |
| LMArena Coding | 1483 | — |

## Reasoning

- Kimi K2.5 Instant: 28.5 (#88)
- Sonar: 20.3 (#221)

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LiveBench Reasoning | — | 46.3% |
| LMArena Hard Prompts | 1443 | — |
| LiveBench Data Analysis | — | 37.9% |
| LiveBench | — | 46.9% |

## Math

- Kimi K2.5 Instant: 36.6 (#105)
- Sonar: 31.3 (#197)

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LiveBench Math | — | 41.6% |
| LMArena Math | 1443 | — |

## Knowledge

- Kimi K2.5 Instant: 39.5 (#121)
- Sonar: —

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LMArena Expert | 1438 | — |

## Multimodal

- Kimi K2.5 Instant: 39.5 (#47)
- Sonar: —

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LMArena Vision | 1254 | — |

## Multilingual

- Kimi K2.5 Instant: 52.2 (#89)
- Sonar: —

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LMArena Non-English | 1406 | — |
| LMArena Chinese | 1450 | — |
| LMArena French | 1403 | — |
| LMArena German | 1413 | — |
| LMArena Korean | 1378 | — |
| LMArena Russian | 1404 | — |
| LMArena Spanish | 1448 | — |

## Instruction Following

- Kimi K2.5 Instant: 75.5 (#61)
- Sonar: 71.5 (#146)

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LiveBench Instruction Following | — | 76.2% |
| LMArena Instruction Following | 1430 | — |

## Long Context

- Kimi K2.5 Instant: 43.8 (#82)
- Sonar: —

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LMArena Longer Query | 1435 | — |

## Writing & Preference

- Kimi K2.5 Instant: 60.8 (#91)
- Sonar: 52.6 (#166)

| Benchmark | Kimi K2.5 Instant | Sonar |
|---|---|---|
| LMArena Text | 1420 | — |
| LMArena Creative Writing | 1379 | — |
| LMArena Multi-Turn | 1427 | — |
| LiveBench Language | — | 44.1% |

## FAQ

### Is Kimi K2.5 Instant better than Sonar?

Kimi K2.5 Instant is the stronger model overall, scoring 42.9 to 37.8 on the Noometry Index.

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

Kimi K2.5 Instant scores higher on coding benchmarks: 42.3 versus 35.1 in the Noometry coding category.

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

0 benchmarks have published results for both models. Kimi K2.5 Instant has 18 scored results on Noometry and Sonar has 7.