# Grok 4 vs Grok 4.5

> Grok 4.5 is the stronger model overall, scoring 55.0 to 48.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-vs-grok-4-5
- Last updated: 2026-10-10
- Shared benchmarks: 28

## Summary

- They share 28 benchmarks with published results for both. Grok 4 scores higher in 2 categories and Grok 4.5 in 8 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 36.7.
- The biggest single-benchmark swing is ARC-AGI-2: 16% for Grok 4 and 52.6% for Grok 4.5.

## Snapshot

| | Grok 4 | Grok 4.5 |
|---|---|---|
| Provider | xAI | xAI |
| Noometry Index | 48.1 | 55.0 |
| Rank | 56 | 25 |
| Context | — | 500K |
| Input $/M | — | $2 |
| Output $/M | — | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- Grok 4: 50.3 (#46)
- Grok 4.5: 52.2 (#35)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| WeirdML | 45.7% | 46.4% |
| LMArena Coding | 1408 | 1474 |
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| Aider Polyglot | 79.6% | — |
| LMArena WebDev | — | 1553 |
| SciCode | — | 54.1% |
| ALE-Bench | — | 1,309 |

## Agentic & Tool Use

- Grok 4: 32.3 (#68)
- Grok 4.5: 44.4 (#17)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| LMArena Search | 1142 | 1213 |
| Terminal-Bench | 27.2% | — |
| APEX-Agents | — | 56.2% |
| Berkeley Function Calling Leaderboard | 63% | — |
| GDPval | 21.1% | — |
| τ²-bench Banking | — | 47.9% |
| Cybench | 43% | — |
| DeepResearch Bench | 47.3% | — |
| PostTrainBench | — | 23.4% |
| BALROG | 43.6% | — |
| GBAEval | — | 65.4% |
| GDP.pdf | — | 14% |
| METR Time Horizons | 66.6% | — |
| Vending-Bench 2 | — | 3,887 |

## Reasoning

- Grok 4: 36.7 (#65)
- Grok 4.5: 56.1 (#25)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| ARC-AGI-2 | 16% | 52.6% |
| SimpleBench | 60.5% | 70% |
| Kagi LLM Benchmark | 73.6% | 83.5% |
| ARC-AGI-1 | 66.7% | 87.2% |
| Chess Puzzles | 28% | 36% |
| LMArena Hard Prompts | 1409 | 1462 |
| Epoch Capabilities Index | 146.44 | 153.92 |
| NYT Connections (extended) | — | 79.9% |
| CritPt | — | 15.4% |
| DTBench | — | 96.5% |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| ForecastBench | 60.9 | — |

## Math

- Grok 4: 48.4 (#64)
- Grok 4.5: 60.9 (#35)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 84% | 97.8% |
| LMArena Math | 1422 | 1459 |
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| ProofBench | — | 31% |
| Omni-MATH | 60.3% | — |
| FrontierMath (Feb 2025 set) | 19.7% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- Grok 4: 53.8 (#55)
- Grok 4.5: 62.3 (#24)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| GPQA Diamond | 87% | 93.4% |
| LMArena Expert | 1415 | 1466 |
| SimpleQA Verified | — | 48.3% |
| MMLU-Pro | 85.1% | — |
| Confabulations | 12.4% | — |
| GPQA (HELM) | 72.7% | — |

## Multimodal

- Grok 4: 33.7 (#94)
- Grok 4.5: 37.6 (#72)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| LMArena Vision | 1210 | 1288 |
| GeoBench | 45% | — |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| LMArena Document | — | 1452 |

## Multilingual

- Grok 4: 51.8 (#103)
- Grok 4.5: 54.4 (#42)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| LMArena Non-English | 1403 | 1440 |
| LMArena Chinese | 1427 | 1496 |
| LMArena French | 1418 | 1456 |
| LMArena German | 1429 | 1446 |
| LMArena Japanese | 1394 | 1428 |
| LMArena Korean | 1377 | 1404 |
| LMArena Russian | 1410 | 1448 |
| LMArena Spanish | 1420 | 1450 |

## Instruction Following

- Grok 4: 79.2 (#5)
- Grok 4.5: 76.0 (#48)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | 1387 | 1446 |
| IFEval | 94.9% | — |

## Long Context

- Grok 4: 63.1 (#4)
- Grok 4.5: 44.8 (#56)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | 1409 | 1463 |
| Fiction.LiveBench | 94.4% | — |

## Writing & Preference

- Grok 4: 58.5 (#116)
- Grok 4.5: 65.8 (#42)

| Benchmark | Grok 4 | Grok 4.5 |
|---|---|---|
| LMArena Text | 1411 | 1448 |
| LMArena Creative Writing | 1397 | 1442 |
| LMArena Multi-Turn | 1416 | 1456 |
| Short-Story Creative Writing | 76.9% | — |
| EQ-Bench Creative Writing | — | 1579 |
| WildBench | 79.7% | — |

## FAQ

### Is Grok 4 better than Grok 4.5?

Grok 4.5 is the stronger model overall, scoring 55.0 to 48.1 on the Noometry Index.

### Is Grok 4 or Grok 4.5 better for coding?

Grok 4.5 scores higher on coding benchmarks: 52.2 versus 50.3 in the Noometry coding category.

### How many benchmarks do Grok 4 and Grok 4.5 share?

28 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and Grok 4.5 has 52.