# GLM-5.1 vs Kimi K2.5

> GLM-5.1 and Kimi K2.5 score almost the same on the Noometry Index (47.8 vs 48.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/glm-5-1-vs-kimi-k2-5
- Last updated: 2026-10-12
- Shared benchmarks: 36

## Summary

- They share 36 benchmarks with published results for both. GLM-5.1 scores higher in 5 categories and Kimi K2.5 in 4 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in agentic & tool use, where Kimi K2.5 leads 34.2 to 24.9.
- The biggest single-benchmark swing is WeirdML: 57.1% for GLM-5.1 and 45.6% for Kimi K2.5.
- Kimi K2.5 is cheaper at $0.45 / $2.25 per million input/output tokens, against $1.40 / $4.40 for GLM-5.1.
- Kimi K2.5 accepts more context: 262K tokens versus 200K.

## Snapshot

| | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| Provider | Z.ai (Zhipu) | Moonshot AI |
| Noometry Index | 47.8 | 48.1 |
| Rank | 59 | 57 |
| Context | 200K | 262K |
| Input $/M | $1.40 | $0.45 |
| Output $/M | $4.40 | $2.25 |
| Weights | Open | Open |

## Coding

- GLM-5.1: 48.7 (#55)
- Kimi K2.5: 48.8 (#53)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| SWE-bench Verified | 74.2% | 73.8% |
| LMArena WebDev | 1508 | 1437 |
| SciCode | 43.8% | 49% |
| WeirdML | 57.1% | 45.6% |
| LMArena Coding | 1485 | 1474 |
| ALE-Bench | 887.1 | 821.65 |
| SWE-bench Verified (bash only) | — | 70.8% |
| SWE-bench Multilingual | — | 67.3% |

## Agentic & Tool Use

- GLM-5.1: 24.9 (#113)
- Kimi K2.5: 34.2 (#48)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| Vending-Bench 2 | 5,634 | 1,198 |
| Terminal-Bench | — | 43.2% |
| APEX-Agents | 40.9% | — |
| OSWorld | — | 63.3% |
| ExploitBench | 18.1% | — |
| GBAEval | 0% | — |

## Reasoning

- GLM-5.1: 39.1 (#60)
- Kimi K2.5: 31.2 (#80)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| SimpleBench | 55.1% | 46.8% |
| NYT Connections (extended) | 77.7% | 69.9% |
| CritPt | 4.6% | 3.1% |
| Chess Puzzles | 19% | 12% |
| Thematic Generalization | 69.8% | 69.4% |
| LMArena Hard Prompts | 1472 | 1453 |
| Epoch Capabilities Index | 149.84 | 148.03 |
| ARC-AGI-2 | — | 11.8% |
| Kagi LLM Benchmark | — | 78.5% |
| ARC-AGI-1 | — | 65.3% |
| EnigmaEval | — | 3.4% |

## Math

- GLM-5.1: 49.7 (#60)
- Kimi K2.5: 51.8 (#53)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| MathArena Final-Answer Competitions | 67.1% | 62.3% |
| OTIS Mock AIME 2024-2025 | 93.3% | 92.2% |
| LMArena Math | 1473 | 1470 |
| FrontierMath (Feb 2025 set) | 33.4% | 27.9% |
| FrontierMath Tier 4 (v1) | 12.5% | 4.2% |
| FrontierMath (Tiers 1-3) | 36.8% | — |
| ProofBench | 22.2% | — |

## Knowledge

- GLM-5.1: 54.9 (#50)
- Kimi K2.5: 53.6 (#56)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| GPQA Diamond | 89.9% | 87.6% |
| SimpleQA Verified | 34% | 34.3% |
| LMArena Expert | 1476 | 1466 |
| Humanity's Last Exam | — | 24.4% |
| Vectara Hallucination Rate | — | 14.2% |

## Multimodal

- GLM-5.1: —
- Kimi K2.5: 41.1 (#39)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| LMArena Vision | — | 1269 |
| LMArena Document | — | 1430 |

## Multilingual

- GLM-5.1: 55.0 (#36)
- Kimi K2.5: 53.9 (#53)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| LMArena Non-English | 1447 | 1433 |
| LMArena Chinese | 1515 | 1495 |
| LMArena French | 1474 | 1454 |
| LMArena German | 1465 | 1441 |
| LMArena Japanese | 1434 | 1421 |
| LMArena Korean | 1418 | 1410 |
| LMArena Russian | 1454 | 1435 |
| LMArena Spanish | 1469 | 1450 |

## Instruction Following

- GLM-5.1: 76.3 (#42)
- Kimi K2.5: 75.3 (#64)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| LMArena Instruction Following | 1451 | 1431 |

## Long Context

- GLM-5.1: 44.9 (#53)
- Kimi K2.5: 52.1 (#7)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| LMArena Longer Query | 1466 | 1445 |
| Fiction.LiveBench | — | 86.1% |
| CL-bench | — | 19.3% |
| CL-bench Life | — | 13.2% |

## Writing & Preference

- GLM-5.1: 66.9 (#31)
- Kimi K2.5: 65.1 (#53)

| Benchmark | GLM-5.1 | Kimi K2.5 |
|---|---|---|
| LMArena Text | 1461 | 1445 |
| LMArena Creative Writing | 1453 | 1423 |
| EQ-Bench Creative Writing | 1592 | 1579 |
| LMArena Multi-Turn | 1472 | 1444 |

## FAQ

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

GLM-5.1 and Kimi K2.5 score almost the same on the Noometry Index (47.8 vs 48.1), so choose on price, context window or the category you care about most.

### Which is cheaper, GLM-5.1 or Kimi K2.5?

Kimi K2.5 is cheaper. It lists at $0.45 per million input tokens and $2.25 per million output tokens; GLM-5.1 lists at $1.40 and $4.40.

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

They score almost the same on coding (48.7 vs 48.8); test both on your own repository before choosing.

### Which has the bigger context window?

Kimi K2.5 does, with 262K tokens against 200K.

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

36 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and Kimi K2.5 has 51.