# GPT-5.5 Pro vs Grok 4.1

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 40.8 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-pro-vs-grok-4-1
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 36.2.

## Snapshot

| | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 64.3 | 40.8 |
| Rank | 7 | 135 |
| Context | 1.05M | — |
| Input $/M | $30 | — |
| Output $/M | $180 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.5 Pro: —
- Grok 4.1: 33.4 (#246)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena WebDev | — | 1214 |
| LMArena Coding | — | 1445 |

## Agentic & Tool Use

- GPT-5.5 Pro: —
- Grok 4.1: 33.8 (#47)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| Cybench | — | 39% |

## Reasoning

- GPT-5.5 Pro: 73.6 (#7)
- Grok 4.1: 28.3 (#91)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 1436 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.45 | — |

## Math

- GPT-5.5 Pro: 83.8 (#8)
- Grok 4.1: 36.2 (#124)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 1422 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |

## Knowledge

- GPT-5.5 Pro: 64.2 (#17)
- Grok 4.1: 38.9 (#129)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| LMArena Expert | — | 1417 |

## Multilingual

- GPT-5.5 Pro: —
- Grok 4.1: 53.6 (#64)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena Non-English | — | 1425 |
| LMArena Chinese | — | 1464 |
| LMArena French | — | 1448 |
| LMArena German | — | 1447 |
| LMArena Japanese | — | 1396 |
| LMArena Korean | — | 1407 |
| LMArena Russian | — | 1434 |
| LMArena Spanish | — | 1438 |

## Instruction Following

- GPT-5.5 Pro: —
- Grok 4.1: 74.0 (#106)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena Instruction Following | — | 1400 |

## Long Context

- GPT-5.5 Pro: —
- Grok 4.1: 43.2 (#96)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena Longer Query | — | 1416 |

## Writing & Preference

- GPT-5.5 Pro: —
- Grok 4.1: 62.6 (#71)

| Benchmark | GPT-5.5 Pro | Grok 4.1 |
|---|---|---|
| LMArena Text | — | 1437 |
| LMArena Creative Writing | — | 1411 |
| LMArena Multi-Turn | — | 1438 |

## FAQ

### Is GPT-5.5 Pro better than Grok 4.1?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 40.8 on the Noometry Index.

### How many benchmarks do GPT-5.5 Pro and Grok 4.1 share?

0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Grok 4.1 has 19.