# GLM-5.3 vs Grok-3 mini

> GLM-5.3 is the stronger model overall, scoring 54.8 to 41.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/glm-5-3-vs-grok-3-mini
- Last updated: 2026-10-11
- Shared benchmarks: 21

## Summary

- They share 21 benchmarks with published results for both. GLM-5.3 scores higher in 7 categories and Grok-3 mini in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GLM-5.3 leads 46.1 to 13.6.
- The biggest single-benchmark swing is WeirdML: 75.4% for GLM-5.3 and 42.6% for Grok-3 mini.
- GLM-5.3 has downloadable open weights; the other is API-only.

## Snapshot

| | GLM-5.3 | Grok-3 mini |
|---|---|---|
| Provider | Z.ai (Zhipu) | xAI |
| Noometry Index | 54.8 | 41.2 |
| Rank | 26 | 141 |
| Context | 1M | — |
| Input $/M | $1.40 | — |
| Output $/M | $4.40 | — |
| Weights | Open | Proprietary |

## Coding

- GLM-5.3: 59.5 (#14)
- Grok-3 mini: 40.8 (#131)

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| WeirdML | 75.4% | 42.6% |
| LMArena Coding | 1496 | 1379 |
| DeepSWE | 69% | — |
| FrontierCode | 40.1% | — |
| Aider Polyglot | — | 49.3% |
| CursorBench | 42.6% | — |
| LMArena WebDev | 1622 | — |
| FrontierSWE | 30.2% | — |
| SciCode | 59% | — |
| ALE-Bench | 1,317 | — |

## Agentic & Tool Use

- GLM-5.3: 36.4 (#38)
- Grok-3 mini: —

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| APEX-Agents | 56.6% | — |
| Vending-Bench 2 | 8,164 | — |

## Reasoning

- GLM-5.3: 46.1 (#46)
- Grok-3 mini: 13.6 (#334)

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| LMArena Hard Prompts | 1489 | 1375 |
| Epoch Capabilities Index | 155.61 | 140.35 |
| ARC-AGI-2 | — | 0.4% |
| Kagi LLM Benchmark | — | 61.3% |
| NYT Connections (extended) | 74.2% | — |
| ARC-AGI-1 | — | 16.5% |
| CritPt | 19.1% | — |
| Chess Puzzles | 21% | — |
| Mystery Game Puzzles | 33% | — |
| DTBench | 87.7% | — |
| LMCA | 55.5% | — |
| Bench to the Future 3 | 0.15 | — |

## Math

- GLM-5.3: 62.3 (#33)
- Grok-3 mini: 42.1 (#85)

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 91.1% | 77.8% |
| LMArena Math | 1489 | 1386 |
| FrontierMath (Tiers 1-3) | 68.8% | — |
| FrontierMath Tier 4 | 29.3% | — |
| ProofBench | 49% | — |
| Omni-MATH | — | 31.8% |
| MATH Level 5 | — | 90.9% |
| FrontierMath (Feb 2025 set) | — | 5.9% |

## Knowledge

- GLM-5.3: 58.3 (#37)
- Grok-3 mini: 46.4 (#81)

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| GPQA Diamond | 90.9% | 76.3% |
| LMArena Expert | 1516 | 1395 |
| SimpleQA Verified | 41% | — |
| MMLU-Pro | — | 79.9% |
| Confabulations | — | 10.8% |
| GPQA (HELM) | — | 67.5% |

## Multilingual

- GLM-5.3: 55.7 (#28)
- Grok-3 mini: 48.1 (#145)

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| LMArena Non-English | 1457 | 1352 |
| LMArena Chinese | 1528 | 1387 |
| LMArena French | 1499 | 1357 |
| LMArena German | 1499 | 1349 |
| LMArena Japanese | 1453 | 1342 |
| LMArena Korean | 1472 | 1335 |
| LMArena Russian | 1463 | 1353 |
| LMArena Spanish | 1460 | 1381 |

## Instruction Following

- GLM-5.3: 77.5 (#23)
- Grok-3 mini: 78.5 (#9)

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| LMArena Instruction Following | 1477 | 1357 |
| IFEval | — | 95.1% |

## Long Context

- GLM-5.3: 45.4 (#41)
- Grok-3 mini: 41.0 (#147)

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| LMArena Longer Query | 1482 | 1372 |
| Fiction.LiveBench | — | 66.7% |

## Writing & Preference

- GLM-5.3: 75.7 (#6)
- Grok-3 mini: 52.5 (#169)

| Benchmark | GLM-5.3 | Grok-3 mini |
|---|---|---|
| LMArena Text | 1471 | 1370 |
| LMArena Creative Writing | 1457 | 1342 |
| LMArena Multi-Turn | 1472 | 1355 |
| Short-Story Creative Writing | — | 73.5% |
| EQ-Bench Creative Writing | 2075 | — |
| WildBench | — | 65.1% |

## FAQ

### Is GLM-5.3 better than Grok-3 mini?

GLM-5.3 is the stronger model overall, scoring 54.8 to 41.2 on the Noometry Index.

### Is GLM-5.3 or Grok-3 mini better for coding?

GLM-5.3 scores higher on coding benchmarks: 59.5 versus 40.8 in the Noometry coding category.

### How many benchmarks do GLM-5.3 and Grok-3 mini share?

21 benchmarks have published results for both models. GLM-5.3 has 42 scored results on Noometry and Grok-3 mini has 35.