# GPT-6 Sol vs Grok 4.5

> Grok 4.5 is the stronger model overall, scoring 55.0 to 49.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-6-sol-vs-grok-4-5
- Last updated: 2026-10-10
- Shared benchmarks: 20

## Summary

- They share 20 benchmarks with published results for both. GPT-6 Sol scores higher in 3 categories and Grok 4.5 in 7 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4.5 leads 60.7 to 35.8.
- The biggest single-benchmark swing is Furniture Assembly: 58.3% for GPT-6 Sol and 22.5% for Grok 4.5.
- Grok 4.5 is cheaper at $2 / $6 per million input/output tokens, against $2 / $10 for GPT-6 Sol.
- GPT-6 Sol accepts more context: 1.05M tokens versus 500K.

## Snapshot

| | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 49.2 | 55.0 |
| Rank | 46 | 22 |
| Context | 1.05M | 500K |
| Input $/M | $2 | $2 |
| Output $/M | $10 | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-6 Sol: 59.6 (#11)
- Grok 4.5: 51.7 (#34)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| DeepSWE | 68.8% | 53.8% |
| FrontierCode | 49.3% | 42.4% |
| LMArena WebDev | 1692 | 1552 |
| LMArena Coding | 1453 | 1473 |
| SciCode | — | 54.1% |
| WeirdML | — | 46.4% |
| ALE-Bench | — | 1,309 |

## Agentic & Tool Use

- GPT-6 Sol: 33.5 (#49)
- Grok 4.5: 44.4 (#15)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| GDP.pdf | 28% | 14% |
| APEX-Agents | — | 56.2% |
| τ²-bench Banking | — | 47.9% |
| PostTrainBench | — | 23.4% |
| GBAEval | — | 65.4% |
| LMArena Search | — | 1213 |
| Vending-Bench 2 | — | 3,887 |

## Reasoning

- GPT-6 Sol: 49.3 (#34)
- Grok 4.5: 56.0 (#23)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| NYT Connections (extended) | 90.1% | 79.9% |
| LMArena Hard Prompts | 1420 | 1462 |
| ARC-AGI-2 | — | 52.6% |
| SimpleBench | — | 70% |
| Kagi LLM Benchmark | — | 83.5% |
| ARC-AGI-1 | — | 87.2% |
| CritPt | — | 15.4% |
| Chess Puzzles | — | 36% |
| EBR-Bench | 53.3% | — |
| DTBench | — | 96.5% |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| Epoch Capabilities Index | — | 154.02 |

## Math

- GPT-6 Sol: 35.8 (#135)
- Grok 4.5: 60.7 (#29)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| LMArena Math | 1404 | 1457 |
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| OTIS Mock AIME 2024-2025 | — | 97.8% |
| ProofBench | — | 31% |

## Knowledge

- GPT-6 Sol: 43.0 (#87)
- Grok 4.5: 62.3 (#21)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| LMArena Expert | 1449 | 1466 |
| GPQA Diamond | — | 93.4% |
| SimpleQA Verified | — | 48.3% |
| Vectara Hallucination Rate | 6.5% | — |

## Multimodal

- GPT-6 Sol: 47.6 (#9)
- Grok 4.5: 37.8 (#63)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| Furniture Assembly | 58.3% | 22.5% |
| LMArena Vision | — | 1287 |
| Blueprint-Bench 2 | — | 27.3% |
| LMArena Document | — | 1452 |

## Multilingual

- GPT-6 Sol: 51.0 (#113)
- Grok 4.5: 54.5 (#43)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| LMArena Non-English | 1389 | 1439 |
| LMArena Chinese | 1416 | 1497 |
| LMArena Russian | 1407 | 1447 |
| LMArena Spanish | 1377 | 1452 |
| LMArena French | — | 1458 |
| LMArena German | — | 1448 |
| LMArena Japanese | — | 1425 |
| LMArena Korean | — | 1402 |

## Instruction Following

- GPT-6 Sol: 74.4 (#97)
- Grok 4.5: 76.3 (#45)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| LMArena Instruction Following | 1406 | 1446 |

## Long Context

- GPT-6 Sol: 43.2 (#100)
- Grok 4.5: 44.8 (#54)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | 1415 | 1463 |

## Writing & Preference

- GPT-6 Sol: 72.3 (#15)
- Grok 4.5: 65.9 (#40)

| Benchmark | GPT-6 Sol | Grok 4.5 |
|---|---|---|
| LMArena Text | 1396 | 1448 |
| LMArena Creative Writing | 1392 | 1442 |
| EQ-Bench Creative Writing | 2125 | 1579 |
| LMArena Multi-Turn | 1405 | 1457 |

## FAQ

### Is GPT-6 Sol better than Grok 4.5?

Grok 4.5 is the stronger model overall, scoring 55.0 to 49.2 on the Noometry Index.

### Which is cheaper, GPT-6 Sol or Grok 4.5?

Grok 4.5 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; GPT-6 Sol lists at $2 and $10.

### Is GPT-6 Sol or Grok 4.5 better for coding?

GPT-6 Sol scores higher on coding benchmarks: 59.6 versus 51.7 in the Noometry coding category.

### Which has the bigger context window?

GPT-6 Sol does, with 1.05M tokens against 500K.

### How many benchmarks do GPT-6 Sol and Grok 4.5 share?

20 benchmarks have published results for both models. GPT-6 Sol has 22 scored results on Noometry and Grok 4.5 has 52.