# Kimi K2.5 Instant vs Muse Spark 1.2

> Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 43.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/kimi-k2-5-instant-vs-muse-spark-1-2
- Last updated: 2026-10-10
- Shared benchmarks: 16

## Summary

- They share 16 benchmarks with published results for both. Kimi K2.5 Instant scores higher in 0 categories and Muse Spark 1.2 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Muse Spark 1.2 leads 51.3 to 29.7.
- Kimi K2.5 Instant has downloadable open weights; the other is API-only.

## Snapshot

| | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| Provider | Moonshot AI | Meta |
| Noometry Index | 43.6 | 50.3 |
| Rank | 89 | 48 |
| Context | — | 1.05M |
| Input $/M | — | $1.25 |
| Output $/M | — | $4.25 |
| Weights | Open | Proprietary |

## Coding

- Kimi K2.5 Instant: 42.6 (#97)
- Muse Spark 1.2: 49.2 (#51)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena WebDev | 1404 | 1533 |
| LMArena Coding | 1484 | 1495 |
| DeepSWE | — | 54.9% |
| FrontierSWE | — | 12% |
| SciCode | — | 56.4% |
| WeirdML | — | 60.3% |

## Agentic & Tool Use

- Kimi K2.5 Instant: —
- Muse Spark 1.2: 29.4 (#87)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| APEX-Agents | — | 36.4% |
| GDP.pdf | — | 16% |

## Reasoning

- Kimi K2.5 Instant: 29.7 (#90)
- Muse Spark 1.2: 51.3 (#34)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena Hard Prompts | 1443 | 1486 |
| SimpleBench | — | 74.5% |
| NYT Connections (extended) | — | 79.2% |
| CritPt | — | 17.7% |
| DTBench | — | 94.7% |
| LMCA | — | 48.4% |
| Epoch Capabilities Index | — | 154.87 |

## Math

- Kimi K2.5 Instant: 39.4 (#105)
- Muse Spark 1.2: 46.4 (#70)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena Math | 1442 | 1471 |
| ProofBench | — | 43% |

## Knowledge

- Kimi K2.5 Instant: 40.2 (#123)
- Muse Spark 1.2: 54.1 (#53)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena Expert | 1440 | 1480 |
| SimpleQA Verified | — | 60.3% |

## Multimodal

- Kimi K2.5 Instant: 40.2 (#50)
- Muse Spark 1.2: 43.4 (#25)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena Vision | 1254 | 1305 |

## Multilingual

- Kimi K2.5 Instant: 52.0 (#94)
- Muse Spark 1.2: 57.1 (#11)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena Non-English | 1406 | 1478 |
| LMArena Chinese | 1449 | 1511 |
| LMArena French | 1403 | 1513 |
| LMArena Russian | 1404 | 1487 |
| LMArena Spanish | 1447 | 1498 |
| LMArena German | 1413 | — |
| LMArena Korean | 1378 | — |

## Instruction Following

- Kimi K2.5 Instant: 75.3 (#65)
- Muse Spark 1.2: 76.7 (#36)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena Instruction Following | 1430 | 1461 |

## Long Context

- Kimi K2.5 Instant: 43.9 (#83)
- Muse Spark 1.2: 45.2 (#48)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena Longer Query | 1435 | 1475 |

## Writing & Preference

- Kimi K2.5 Instant: 60.6 (#95)
- Muse Spark 1.2: 72.3 (#14)

| Benchmark | Kimi K2.5 Instant | Muse Spark 1.2 |
|---|---|---|
| LMArena Text | 1420 | 1482 |
| LMArena Creative Writing | 1381 | 1449 |
| LMArena Multi-Turn | 1427 | 1494 |
| EQ-Bench Creative Writing | — | 1840 |

## FAQ

### Is Kimi K2.5 Instant better than Muse Spark 1.2?

Muse Spark 1.2 is the stronger model overall, scoring 50.3 to 43.6 on the Noometry Index.

### Is Kimi K2.5 Instant or Muse Spark 1.2 better for coding?

Muse Spark 1.2 scores higher on coding benchmarks: 49.2 versus 42.6 in the Noometry coding category.

### How many benchmarks do Kimi K2.5 Instant and Muse Spark 1.2 share?

16 benchmarks have published results for both models. Kimi K2.5 Instant has 18 scored results on Noometry and Muse Spark 1.2 has 31.