# GLM-4.5-Air vs GLM-4.6

> GLM-4.6 is the stronger model overall, scoring 40.9 to 38.7 on the Noometry Index. GLM-4.5-Air costs 2.4× less per token, which makes it the better buy when GLM-4.6's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/glm-4-5-air-vs-glm-4-6
- Last updated: 2026-10-10
- Shared benchmarks: 19

## Summary

- They share 19 benchmarks with published results for both. GLM-4.5-Air scores higher in 1 category and GLM-4.6 in 7 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in coding, where GLM-4.6 leads 39.9 to 34.5.
- GLM-4.5-Air is cheaper at $0.20 / $1.10 per million input/output tokens, against $0.60 / $2.20 for GLM-4.6.
- GLM-4.6 accepts more context: 205K tokens versus 131K.

## Snapshot

| | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| Provider | Z.ai (Zhipu) | Z.ai (Zhipu) |
| Noometry Index | 38.7 | 40.9 |
| Rank | 169 | 132 |
| Context | 131K | 205K |
| Input $/M | $0.20 | $0.60 |
| Output $/M | $1.10 | $2.20 |
| Weights | Open | Open |

## Coding

- GLM-4.5-Air: 34.5 (#225)
- GLM-4.6: 39.9 (#137)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| LMArena Coding | 1397 | 1449 |
| SWE-bench Verified (bash only) | — | 55.4% |
| LMArena WebDev | — | 1339 |
| SciCode | — | 38.4% |
| GSO | 2.9% | — |
| ALE-Bench | — | 340.82 |

## Agentic & Tool Use

- GLM-4.5-Air: —
- GLM-4.6: 32.1 (#60)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| Terminal-Bench | — | 24.5% |
| Berkeley Function Calling Leaderboard | — | 72.4% |

## Reasoning

- GLM-4.5-Air: 23.3 (#166)
- GLM-4.6: 23.1 (#168)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| Kagi LLM Benchmark | 43% | 47.4% |
| LMArena Hard Prompts | 1379 | 1440 |
| CritPt | — | 1.1% |
| ForecastBench | 59.2 | — |

## Math

- GLM-4.5-Air: 33.8 (#166)
- GLM-4.6: 36.4 (#115)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| LMArena Math | 1396 | 1431 |
| Omni-MATH | 39.1% | — |
| FrontierMath (Feb 2025 set) | — | 3.8% |
| FrontierMath Tier 4 (v1) | — | 2.1% |

## Knowledge

- GLM-4.5-Air: 34.6 (#184)
- GLM-4.6: 39.6 (#118)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| Vectara Hallucination Rate | 9.3% | 9.5% |
| LMArena Expert | 1370 | 1432 |
| Humanity's Last Exam | 8.1% | — |
| MMLU-Pro | 76.2% | — |
| GPQA (HELM) | 59.4% | — |

## Multilingual

- GLM-4.5-Air: 49.4 (#130)
- GLM-4.6: 53.6 (#62)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| LMArena Non-English | 1366 | 1426 |
| LMArena Chinese | 1427 | 1500 |
| LMArena French | 1399 | 1459 |
| LMArena German | 1376 | 1447 |
| LMArena Japanese | 1348 | 1394 |
| LMArena Korean | 1306 | 1401 |
| LMArena Russian | 1373 | 1418 |
| LMArena Spanish | 1385 | 1436 |

## Instruction Following

- GLM-4.5-Air: 69.8 (#165)
- GLM-4.6: 74.5 (#93)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| LMArena Instruction Following | 1353 | 1410 |
| IFEval | 81.2% | — |

## Long Context

- GLM-4.5-Air: 41.6 (#130)
- GLM-4.6: 43.4 (#91)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| LMArena Longer Query | 1367 | 1423 |

## Writing & Preference

- GLM-4.5-Air: 56.1 (#134)
- GLM-4.6: 61.3 (#86)

| Benchmark | GLM-4.5-Air | GLM-4.6 |
|---|---|---|
| LMArena Text | 1384 | 1440 |
| LMArena Creative Writing | 1343 | 1411 |
| LMArena Multi-Turn | 1371 | 1427 |
| EQ-Bench Creative Writing | — | 1411 |
| WildBench | 78.9% | — |

## FAQ

### Is GLM-4.5-Air better than GLM-4.6?

GLM-4.6 is the stronger model overall, scoring 40.9 to 38.7 on the Noometry Index. GLM-4.5-Air costs 2.4× less per token, which makes it the better buy when GLM-4.6's lead doesn't matter for your workload.

### Which is cheaper, GLM-4.5-Air or GLM-4.6?

GLM-4.5-Air is cheaper. It lists at $0.20 per million input tokens and $1.10 per million output tokens; GLM-4.6 lists at $0.60 and $2.20.

### Is GLM-4.5-Air or GLM-4.6 better for coding?

GLM-4.6 scores higher on coding benchmarks: 39.9 versus 34.5 in the Noometry coding category.

### Which has the bigger context window?

GLM-4.6 does, with 205K tokens against 131K.

### How many benchmarks do GLM-4.5-Air and GLM-4.6 share?

19 benchmarks have published results for both models. GLM-4.5-Air has 27 scored results on Noometry and GLM-4.6 has 29.