# GLM-4.5-Air vs Grok 3

> GLM-4.5-Air and Grok 3 score almost the same on the Noometry Index (38.7 vs 39.6), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/glm-4-5-air-vs-grok-3
- Last updated: 2026-10-10
- Shared benchmarks: 24

## Summary

- They share 24 benchmarks with published results for both. GLM-4.5-Air scores higher in 3 categories and Grok 3 in 5 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 3 leads 46.0 to 34.6.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 43% for GLM-4.5-Air and 61.3% for Grok 3.
- GLM-4.5-Air has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-4.5-Air | Grok 3 |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 38.7 | 39.6 |
| Rank | 169 | 150 |
| Context | 131K | — |
| Input $/M | $0.20 | — |
| Output $/M | $1.10 | — |
| Weights | Open | Proprietary |

## Coding

- GLM-4.5-Air: 34.5 (#225)
- Grok 3: 41.5 (#113)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| LMArena Coding | 1397 | 1432 |
| Aider Polyglot | — | 53.3% |
| GSO | 2.9% | — |
| WeirdML | — | 37.2% |

## Agentic & Tool Use

- GLM-4.5-Air: —
- Grok 3: 30.2 (#69)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| BALROG | — | 29.5% |

## Reasoning

- GLM-4.5-Air: 23.3 (#166)
- Grok 3: 13.8 (#322)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| Kagi LLM Benchmark | 43% | 61.3% |
| LMArena Hard Prompts | 1379 | 1433 |
| ARC-AGI-2 | — | 0% |
| SimpleBench | — | 36.1% |
| ARC-AGI-1 | — | 5.5% |
| Epoch Capabilities Index | — | 138.34 |
| ForecastBench | 59.2 | — |

## Math

- GLM-4.5-Air: 33.8 (#166)
- Grok 3: 36.2 (#122)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| Omni-MATH | 39.1% | 46.4% |
| LMArena Math | 1396 | 1390 |
| OTIS Mock AIME 2024-2025 | — | 55.6% |
| MATH Level 5 | — | 88.7% |
| FrontierMath (Feb 2025 set) | — | 3.8% |
| FrontierMath Tier 4 (v1) | — | 0% |

## Knowledge

- GLM-4.5-Air: 34.6 (#184)
- Grok 3: 46.0 (#76)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| MMLU-Pro | 76.2% | 78.8% |
| Vectara Hallucination Rate | 9.3% | 5.8% |
| GPQA (HELM) | 59.4% | 65% |
| LMArena Expert | 1370 | 1420 |
| GPQA Diamond | — | 75.8% |
| Humanity's Last Exam | 8.1% | — |
| Confabulations | — | 14.2% |

## Multilingual

- GLM-4.5-Air: 49.4 (#130)
- Grok 3: 52.5 (#81)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| LMArena Non-English | 1366 | 1411 |
| LMArena Chinese | 1427 | 1448 |
| LMArena French | 1399 | 1460 |
| LMArena German | 1376 | 1431 |
| LMArena Japanese | 1348 | 1389 |
| LMArena Korean | 1306 | 1374 |
| LMArena Russian | 1373 | 1416 |
| LMArena Spanish | 1385 | 1417 |

## Instruction Following

- GLM-4.5-Air: 69.8 (#165)
- Grok 3: 75.2 (#69)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| IFEval | 81.2% | 88.4% |
| LMArena Instruction Following | 1353 | 1409 |

## Long Context

- GLM-4.5-Air: 41.6 (#130)
- Grok 3: 38.7 (#187)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| LMArena Longer Query | 1367 | 1439 |
| Fiction.LiveBench | — | 58.3% |

## Writing & Preference

- GLM-4.5-Air: 56.1 (#134)
- Grok 3: 56.0 (#136)

| Benchmark | GLM-4.5-Air | Grok 3 |
|---|---|---|
| LMArena Text | 1384 | 1426 |
| LMArena Creative Writing | 1343 | 1414 |
| WildBench | 78.9% | 84.9% |
| LMArena Multi-Turn | 1371 | 1424 |
| Short-Story Creative Writing | — | 76.4% |
| EQ-Bench Creative Writing | — | 1186 |

## FAQ

### Is GLM-4.5-Air better than Grok 3?

GLM-4.5-Air and Grok 3 score almost the same on the Noometry Index (38.7 vs 39.6), so choose on price, context window or the category you care about most.

### Is GLM-4.5-Air or Grok 3 better for coding?

Grok 3 scores higher on coding benchmarks: 41.5 versus 34.5 in the Noometry coding category.

### How many benchmarks do GLM-4.5-Air and Grok 3 share?

24 benchmarks have published results for both models. GLM-4.5-Air has 27 scored results on Noometry and Grok 3 has 40.