# GLM-4.7-Flash vs Grok 4 Fast

> GLM-4.7-Flash and Grok 4 Fast score almost the same on the Noometry Index (38.8 vs 39.4), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/glm-4-7-flash-vs-grok-4-fast
- Last updated: 2026-10-10
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GLM-4.7-Flash scores higher in 2 categories and Grok 4 Fast in 6 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 Fast leads 63.2 to 40.9.
- The biggest single-benchmark swing is Vectara Hallucination Rate: 9.3% for GLM-4.7-Flash and 19.7% for Grok 4 Fast.
- GLM-4.7-Flash has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 38.8 | 39.4 |
| Rank | 180 | 167 |
| Context | 200K | — |
| Input $/M | $0.06 | — |
| Output $/M | $0.40 | — |
| Weights | Open | Proprietary |

## Coding

- GLM-4.7-Flash: 40.6 (#135)
- Grok 4 Fast: 32.5 (#271)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| LMArena Coding | 1383 | 1429 |
| LMArena WebDev | — | 1159 |
| WeirdML | — | 42.9% |

## Agentic & Tool Use

- GLM-4.7-Flash: —
- Grok 4 Fast: 29.5 (#86)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| τ²-bench Banking | — | 15.7% |
| Cybench | — | 30% |
| LMArena Search | — | 1171 |

## Reasoning

- GLM-4.7-Flash: 20.9 (#229)
- Grok 4 Fast: 22.2 (#201)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| LMArena Hard Prompts | 1356 | 1412 |
| ARC-AGI-2 | — | 5.3% |
| Kagi LLM Benchmark | — | 66.1% |
| ARC-AGI-1 | — | 48.5% |
| Chess Puzzles | 0% | — |
| DTBench | — | 82.7% |
| Epoch Capabilities Index | — | 144.2 |
| ForecastBench | — | 60.5 |

## Math

- GLM-4.7-Flash: 36.1 (#173)
- Grok 4 Fast: 38.9 (#123)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| LMArena Math | 1355 | 1419 |
| OTIS Mock AIME 2024-2025 | 58.3% | — |

## Knowledge

- GLM-4.7-Flash: 35.5 (#184)
- Grok 4 Fast: 32.0 (#214)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| Vectara Hallucination Rate | 9.3% | 19.7% |
| LMArena Expert | 1357 | 1411 |
| GPQA Diamond | 60.5% | — |

## Multilingual

- GLM-4.7-Flash: 46.5 (#158)
- Grok 4 Fast: 51.3 (#111)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| LMArena Non-English | 1330 | 1396 |
| LMArena Chinese | 1403 | 1457 |
| LMArena French | 1332 | 1431 |
| LMArena German | 1337 | 1383 |
| LMArena Korean | 1283 | 1357 |
| LMArena Russian | 1332 | 1389 |
| LMArena Spanish | 1350 | 1415 |
| LMArena Japanese | — | 1352 |

## Instruction Following

- GLM-4.7-Flash: 70.1 (#167)
- Grok 4 Fast: 73.2 (#121)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| LMArena Instruction Following | 1327 | 1387 |

## Long Context

- GLM-4.7-Flash: 40.9 (#148)
- Grok 4 Fast: 63.2 (#3)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| LMArena Longer Query | 1345 | 1415 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- GLM-4.7-Flash: 47.4 (#210)
- Grok 4 Fast: 60.0 (#102)

| Benchmark | GLM-4.7-Flash | Grok 4 Fast |
|---|---|---|
| LMArena Text | 1351 | 1407 |
| LMArena Creative Writing | 1297 | 1387 |
| LMArena Multi-Turn | 1342 | 1414 |
| EQ-Bench Creative Writing | 1125 | — |

## FAQ

### Is GLM-4.7-Flash better than Grok 4 Fast?

GLM-4.7-Flash and Grok 4 Fast score almost the same on the Noometry Index (38.8 vs 39.4), so choose on price, context window or the category you care about most.

### Is GLM-4.7-Flash or Grok 4 Fast better for coding?

GLM-4.7-Flash scores higher on coding benchmarks: 40.6 versus 32.5 in the Noometry coding category.

### How many benchmarks do GLM-4.7-Flash and Grok 4 Fast share?

17 benchmarks have published results for both models. GLM-4.7-Flash has 21 scored results on Noometry and Grok 4 Fast has 30.