# GLM-5.1 vs Grok 4.3

> GLM-5.1 is the stronger model overall, scoring 47.6 to 43.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/glm-5-1-vs-grok-4-3
- Last updated: 2026-10-10
- Shared benchmarks: 31

## Summary

- They share 31 benchmarks with published results for both. GLM-5.1 scores higher in 8 categories and Grok 4.3 in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GLM-5.1 leads 67.2 to 58.6.
- The biggest single-benchmark swing is NYT Connections (extended): 77.7% for GLM-5.1 and 55.2% for Grok 4.3.
- Grok 4.3 is cheaper at $1.25 / $2.50 per million input/output tokens, against $1.40 / $4.40 for GLM-5.1.
- Grok 4.3 accepts more context: 1M tokens versus 200K.
- GLM-5.1 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-5.1 | Grok 4.3 |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 47.6 | 43.6 |
| Rank | 51 | 80 |
| Context | 200K | 1M |
| Input $/M | $1.40 | $1.25 |
| Output $/M | $4.40 | $2.50 |
| Weights | Open | Proprietary |

## Coding

- GLM-5.1: 48.5 (#52)
- Grok 4.3: 41.3 (#117)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| LMArena WebDev | 1509 | 1357 |
| SciCode | 43.8% | 47.3% |
| WeirdML | 57.1% | 49.9% |
| LMArena Coding | 1486 | 1415 |
| ALE-Bench | 887.1 | 944.17 |
| SWE-bench Verified | 74.2% | — |

## Agentic & Tool Use

- GLM-5.1: 24.8 (#106)
- Grok 4.3: 27.6 (#93)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| Vending-Bench 2 | 5,634 | 35.26 |
| APEX-Agents | 40.9% | — |
| ExploitBench | 18.1% | — |
| GBAEval | 0% | — |
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |

## Reasoning

- GLM-5.1: 38.2 (#57)
- Grok 4.3: 34.9 (#60)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| NYT Connections (extended) | 77.7% | 55.2% |
| CritPt | 4.6% | 8% |
| Chess Puzzles | 19% | 25% |
| LMArena Hard Prompts | 1472 | 1397 |
| Epoch Capabilities Index | 149.86 | 149.13 |
| SimpleBench | 55.1% | — |
| Thematic Generalization | 69.8% | — |
| DTBench | — | 90.7% |
| LMCA | — | 38.3% |
| ForecastBench | — | 60.3 |

## Math

- GLM-5.1: 49.0 (#48)
- Grok 4.3: 45.8 (#60)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 36.8% | 42.8% |
| OTIS Mock AIME 2024-2025 | 93.3% | 93.3% |
| ProofBench | 22.2% | 11% |
| LMArena Math | 1472 | 1388 |
| FrontierMath Tier 4 | — | 14.6% |
| MathArena Final-Answer Competitions | 67.1% | — |
| FrontierMath (Feb 2025 set) | 33.4% | — |
| FrontierMath Tier 4 (v1) | 12.5% | — |

## Knowledge

- GLM-5.1: 55.0 (#45)
- Grok 4.3: 52.5 (#57)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| GPQA Diamond | 89.9% | 88.8% |
| SimpleQA Verified | 34% | 33.2% |
| LMArena Expert | 1477 | 1385 |

## Multimodal

- GLM-5.1: —
- Grok 4.3: 31.6 (#96)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| LMArena Vision | — | 1231 |
| Blueprint-Bench 2 | — | 0% |

## Multilingual

- GLM-5.1: 55.2 (#34)
- Grok 4.3: 50.7 (#114)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| LMArena Non-English | 1448 | 1385 |
| LMArena Chinese | 1516 | 1423 |
| LMArena French | 1478 | 1412 |
| LMArena German | 1466 | 1395 |
| LMArena Japanese | 1436 | 1379 |
| LMArena Korean | 1423 | 1357 |
| LMArena Russian | 1453 | 1399 |
| LMArena Spanish | 1467 | 1402 |

## Instruction Following

- GLM-5.1: 76.5 (#41)
- Grok 4.3: 72.3 (#135)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | 1451 | 1366 |

## Long Context

- GLM-5.1: 44.9 (#51)
- Grok 4.3: 42.5 (#118)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | 1467 | 1393 |

## Writing & Preference

- GLM-5.1: 67.2 (#29)
- Grok 4.3: 58.6 (#112)

| Benchmark | GLM-5.1 | Grok 4.3 |
|---|---|---|
| LMArena Text | 1462 | 1397 |
| LMArena Creative Writing | 1454 | 1380 |
| LMArena Multi-Turn | 1473 | 1406 |
| EQ-Bench Creative Writing | 1592 | — |
| EQ-Bench 4 | — | 1075 |

## FAQ

### Is GLM-5.1 better than Grok 4.3?

GLM-5.1 is the stronger model overall, scoring 47.6 to 43.6 on the Noometry Index.

### Which is cheaper, GLM-5.1 or Grok 4.3?

Grok 4.3 is cheaper. It lists at $1.25 per million input tokens and $2.50 per million output tokens; GLM-5.1 lists at $1.40 and $4.40.

### Is GLM-5.1 or Grok 4.3 better for coding?

GLM-5.1 scores higher on coding benchmarks: 48.5 versus 41.3 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.3 does, with 1M tokens against 200K.

### How many benchmarks do GLM-5.1 and Grok 4.3 share?

31 benchmarks have published results for both models. GLM-5.1 has 41 scored results on Noometry and Grok 4.3 has 40.