# GLM-4.6 vs Grok 4.1 Fast

> GLM-4.6 and Grok 4.1 Fast score almost the same on the Noometry Index (40.9 vs 40.9), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/glm-4-6-vs-grok-4-1-fast
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. GLM-4.6 scores higher in 7 categories and Grok 4.1 Fast in 2 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 42.3 to 23.1.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 9.5% for GLM-4.6 and 17.8% for Grok 4.1 Fast.
- Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $0.60 / $2.20 for GLM-4.6.
- GLM-4.6 accepts more context: 205K tokens versus 128K.
- GLM-4.6 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 40.9 | 40.9 |
| Rank | 132 | 131 |
| Context | 205K | 128K |
| Input $/M | $0.60 | $0.20 |
| Output $/M | $2.20 | $0.50 |
| Weights | Open | Proprietary |

## Coding

- GLM-4.6: 39.9 (#137)
- Grok 4.1 Fast: 33.8 (#236)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| LMArena WebDev | 1339 | 1241 |
| LMArena Coding | 1449 | 1411 |
| ALE-Bench | 340.82 | 394.93 |
| SWE-bench Verified (bash only) | 55.4% | — |
| SciCode | 38.4% | — |

## Agentic & Tool Use

- GLM-4.6: 32.1 (#60)
- Grok 4.1 Fast: 36.1 (#35)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | 72.4% | 69.6% |
| Terminal-Bench | 24.5% | — |
| τ²-bench Banking | — | 13.1% |
| LMArena Search | — | 1171 |
| Vending-Bench 2 | — | 1,107 |

## Reasoning

- GLM-4.6: 23.1 (#168)
- Grok 4.1 Fast: 42.3 (#45)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| LMArena Hard Prompts | 1440 | 1407 |
| SimpleBench | — | 56% |
| Kagi LLM Benchmark | 47.4% | — |
| NYT Connections (extended) | — | 87.4% |
| CritPt | 1.1% | — |
| DTBench | — | 87.7% |
| ForecastBench | — | 61 |

## Math

- GLM-4.6: 36.4 (#115)
- Grok 4.1 Fast: 30.9 (#201)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| LMArena Math | 1431 | 1408 |
| MathArena Final-Answer Competitions | — | 60.9% |
| ProofBench | — | 4% |
| FrontierMath (Feb 2025 set) | 3.8% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- GLM-4.6: 39.6 (#118)
- Grok 4.1 Fast: 32.6 (#203)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| Vectara Hallucination Rate | 9.5% | 17.8% |
| LMArena Expert | 1432 | 1398 |

## Multimodal

- GLM-4.6: —
- Grok 4.1 Fast: 36.3 (#71)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| LMArena Vision | — | 1201 |

## Multilingual

- GLM-4.6: 53.6 (#62)
- Grok 4.1 Fast: 51.1 (#110)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| LMArena Non-English | 1426 | 1391 |
| LMArena Chinese | 1500 | 1441 |
| LMArena French | 1459 | 1416 |
| LMArena German | 1447 | 1404 |
| LMArena Japanese | 1394 | 1347 |
| LMArena Korean | 1401 | 1361 |
| LMArena Russian | 1418 | 1387 |
| LMArena Spanish | 1436 | 1411 |

## Instruction Following

- GLM-4.6: 74.5 (#93)
- Grok 4.1 Fast: 72.8 (#127)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| LMArena Instruction Following | 1410 | 1376 |

## Long Context

- GLM-4.6: 43.4 (#91)
- Grok 4.1 Fast: 42.4 (#121)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| LMArena Longer Query | 1423 | 1390 |

## Writing & Preference

- GLM-4.6: 61.3 (#86)
- Grok 4.1 Fast: 57.4 (#126)

| Benchmark | GLM-4.6 | Grok 4.1 Fast |
|---|---|---|
| LMArena Text | 1440 | 1408 |
| LMArena Creative Writing | 1411 | 1394 |
| EQ-Bench Creative Writing | 1411 | 1327 |
| LMArena Multi-Turn | 1427 | 1389 |

## FAQ

### Is GLM-4.6 better than Grok 4.1 Fast?

GLM-4.6 and Grok 4.1 Fast score almost the same on the Noometry Index (40.9 vs 40.9), so choose on price, context window or the category you care about most.

### Which is cheaper, GLM-4.6 or Grok 4.1 Fast?

Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; GLM-4.6 lists at $0.60 and $2.20.

### Is GLM-4.6 or Grok 4.1 Fast better for coding?

GLM-4.6 scores higher on coding benchmarks: 39.9 versus 33.8 in the Noometry coding category.

### Which has the bigger context window?

GLM-4.6 does, with 205K tokens against 128K.

### How many benchmarks do GLM-4.6 and Grok 4.1 Fast share?

22 benchmarks have published results for both models. GLM-4.6 has 29 scored results on Noometry and Grok 4.1 Fast has 32.