# GLM-5.1 vs Kimi K2.5 Instant

> GLM-5.1 is the stronger model overall, scoring 47.8 to 43.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/glm-5-1-vs-kimi-k2-5-instant
- Last updated: 2026-10-12
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GLM-5.1 scores higher in 8 categories and Kimi K2.5 Instant in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GLM-5.1 leads 54.9 to 40.2.

## Snapshot

| | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| Provider | Z.ai (Zhipu) | Moonshot AI |
| Noometry Index | 47.8 | 43.6 |
| Rank | 59 | 89 |
| Context | 200K | — |
| Input $/M | $1.40 | — |
| Output $/M | $4.40 | — |
| Weights | Open | Open |

## Coding

- GLM-5.1: 48.7 (#55)
- Kimi K2.5 Instant: 42.6 (#97)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena WebDev | 1508 | 1404 |
| LMArena Coding | 1485 | 1484 |
| SWE-bench Verified | 74.2% | — |
| SciCode | 43.8% | — |
| WeirdML | 57.1% | — |
| ALE-Bench | 887.1 | — |

## Agentic & Tool Use

- GLM-5.1: 24.9 (#113)
- Kimi K2.5 Instant: —

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| APEX-Agents | 40.9% | — |
| ExploitBench | 18.1% | — |
| GBAEval | 0% | — |
| Vending-Bench 2 | 5,634 | — |

## Reasoning

- GLM-5.1: 39.1 (#60)
- Kimi K2.5 Instant: 29.7 (#90)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1472 | 1443 |
| SimpleBench | 55.1% | — |
| NYT Connections (extended) | 77.7% | — |
| CritPt | 4.6% | — |
| Chess Puzzles | 19% | — |
| Thematic Generalization | 69.8% | — |
| Epoch Capabilities Index | 149.84 | — |

## Math

- GLM-5.1: 49.7 (#60)
- Kimi K2.5 Instant: 39.4 (#105)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena Math | 1473 | 1442 |
| FrontierMath (Tiers 1-3) | 36.8% | — |
| MathArena Final-Answer Competitions | 67.1% | — |
| OTIS Mock AIME 2024-2025 | 93.3% | — |
| ProofBench | 22.2% | — |
| FrontierMath (Feb 2025 set) | 33.4% | — |
| FrontierMath Tier 4 (v1) | 12.5% | — |

## Knowledge

- GLM-5.1: 54.9 (#50)
- Kimi K2.5 Instant: 40.2 (#123)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena Expert | 1476 | 1440 |
| GPQA Diamond | 89.9% | — |
| SimpleQA Verified | 34% | — |

## Multimodal

- GLM-5.1: —
- Kimi K2.5 Instant: 40.2 (#50)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena Vision | — | 1254 |

## Multilingual

- GLM-5.1: 55.0 (#36)
- Kimi K2.5 Instant: 52.0 (#94)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena Non-English | 1447 | 1406 |
| LMArena Chinese | 1515 | 1449 |
| LMArena French | 1474 | 1403 |
| LMArena German | 1465 | 1413 |
| LMArena Korean | 1418 | 1378 |
| LMArena Russian | 1454 | 1404 |
| LMArena Spanish | 1469 | 1447 |
| LMArena Japanese | 1434 | — |

## Instruction Following

- GLM-5.1: 76.3 (#42)
- Kimi K2.5 Instant: 75.3 (#65)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1451 | 1430 |

## Long Context

- GLM-5.1: 44.9 (#53)
- Kimi K2.5 Instant: 43.9 (#83)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena Longer Query | 1466 | 1435 |

## Writing & Preference

- GLM-5.1: 66.9 (#31)
- Kimi K2.5 Instant: 60.6 (#95)

| Benchmark | GLM-5.1 | Kimi K2.5 Instant |
|---|---|---|
| LMArena Text | 1461 | 1420 |
| LMArena Creative Writing | 1453 | 1381 |
| LMArena Multi-Turn | 1472 | 1427 |
| EQ-Bench Creative Writing | 1592 | — |

## FAQ

### Is GLM-5.1 better than Kimi K2.5 Instant?

GLM-5.1 is the stronger model overall, scoring 47.8 to 43.6 on the Noometry Index.

### Is GLM-5.1 or Kimi K2.5 Instant better for coding?

GLM-5.1 scores higher on coding benchmarks: 48.7 versus 42.6 in the Noometry coding category.

### How many benchmarks do GLM-5.1 and Kimi K2.5 Instant share?

17 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and Kimi K2.5 Instant has 18.