# GLM-5.1 vs Grok 4

> GLM-5.1 and Grok 4 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-grok-4
- Last updated: 2026-10-10
- Shared benchmarks: 25

## Summary

- They share 25 benchmarks with published results for both. GLM-5.1 scores higher in 5 categories and Grok 4 in 4 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 leads 63.1 to 44.9.
- The biggest single-benchmark swing is WeirdML: 57.1% for GLM-5.1 and 45.7% for Grok 4.
- GLM-5.1 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-5.1 | Grok 4 |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 47.8 | 48.1 |
| Rank | 59 | 56 |
| Context | 200K | — |
| Input $/M | $1.40 | — |
| Output $/M | $4.40 | — |
| Weights | Open | Proprietary |

## Coding

- GLM-5.1: 48.7 (#55)
- Grok 4: 50.3 (#46)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| WeirdML | 57.1% | 45.7% |
| LMArena Coding | 1485 | 1408 |
| SWE-bench Verified | 74.2% | — |
| Aider Polyglot | — | 79.6% |
| LMArena WebDev | 1508 | — |
| SciCode | 43.8% | — |
| ALE-Bench | 887.1 | — |

## Agentic & Tool Use

- GLM-5.1: 24.9 (#113)
- Grok 4: 32.3 (#68)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| Terminal-Bench | — | 27.2% |
| APEX-Agents | 40.9% | — |
| Berkeley Function Calling Leaderboard | — | 63% |
| GDPval | — | 21.1% |
| Cybench | — | 43% |
| DeepResearch Bench | — | 47.3% |
| BALROG | — | 43.6% |
| ExploitBench | 18.1% | — |
| GBAEval | 0% | — |
| LMArena Search | — | 1142 |
| METR Time Horizons | — | 66.6% |
| Vending-Bench 2 | 5,634 | — |

## Reasoning

- GLM-5.1: 39.1 (#60)
- Grok 4: 36.7 (#65)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| SimpleBench | 55.1% | 60.5% |
| Chess Puzzles | 19% | 28% |
| LMArena Hard Prompts | 1472 | 1409 |
| Epoch Capabilities Index | 149.84 | 146.44 |
| ARC-AGI-2 | — | 16% |
| Kagi LLM Benchmark | — | 73.6% |
| NYT Connections (extended) | 77.7% | — |
| ARC-AGI-1 | — | 66.7% |
| CritPt | 4.6% | — |
| Thematic Generalization | 69.8% | — |
| ForecastBench | — | 60.9 |

## Math

- GLM-5.1: 49.7 (#60)
- Grok 4: 48.4 (#64)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 93.3% | 84% |
| LMArena Math | 1473 | 1422 |
| FrontierMath (Feb 2025 set) | 33.4% | 19.7% |
| FrontierMath Tier 4 (v1) | 12.5% | 2.1% |
| FrontierMath (Tiers 1-3) | 36.8% | — |
| MathArena Final-Answer Competitions | 67.1% | — |
| ProofBench | 22.2% | — |
| Omni-MATH | — | 60.3% |

## Knowledge

- GLM-5.1: 54.9 (#50)
- Grok 4: 53.8 (#55)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| GPQA Diamond | 89.9% | 87% |
| LMArena Expert | 1476 | 1415 |
| SimpleQA Verified | 34% | — |
| MMLU-Pro | — | 85.1% |
| Confabulations | — | 12.4% |
| GPQA (HELM) | — | 72.7% |

## Multimodal

- GLM-5.1: —
- Grok 4: 33.7 (#94)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| LMArena Vision | — | 1210 |
| GeoBench | — | 45% |

## Multilingual

- GLM-5.1: 55.0 (#36)
- Grok 4: 51.8 (#103)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| LMArena Non-English | 1447 | 1403 |
| LMArena Chinese | 1515 | 1427 |
| LMArena French | 1474 | 1418 |
| LMArena German | 1465 | 1429 |
| LMArena Japanese | 1434 | 1394 |
| LMArena Korean | 1418 | 1377 |
| LMArena Russian | 1454 | 1410 |
| LMArena Spanish | 1469 | 1420 |

## Instruction Following

- GLM-5.1: 76.3 (#42)
- Grok 4: 79.2 (#5)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| LMArena Instruction Following | 1451 | 1387 |
| IFEval | — | 94.9% |

## Long Context

- GLM-5.1: 44.9 (#53)
- Grok 4: 63.1 (#4)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| LMArena Longer Query | 1466 | 1409 |
| Fiction.LiveBench | — | 94.4% |

## Writing & Preference

- GLM-5.1: 66.9 (#31)
- Grok 4: 58.5 (#116)

| Benchmark | GLM-5.1 | Grok 4 |
|---|---|---|
| LMArena Text | 1461 | 1411 |
| LMArena Creative Writing | 1453 | 1397 |
| LMArena Multi-Turn | 1472 | 1416 |
| Short-Story Creative Writing | — | 76.9% |
| EQ-Bench Creative Writing | 1592 | — |
| WildBench | — | 79.7% |

## FAQ

### Is GLM-5.1 better than Grok 4?

GLM-5.1 and Grok 4 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.

### Is GLM-5.1 or Grok 4 better for coding?

Grok 4 scores higher on coding benchmarks: 50.3 versus 48.7 in the Noometry coding category.

### How many benchmarks do GLM-5.1 and Grok 4 share?

25 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and Grok 4 has 48.