# GPT-5.5 Instant vs Grok 4.7

> Grok 4.7 is the stronger model overall, scoring 53.1 to 42.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-instant-vs-grok-4-7
- Last updated: 2026-10-12
- Shared benchmarks: 23

## Summary

- They share 23 benchmarks with published results for both. GPT-5.5 Instant scores higher in 4 categories and Grok 4.7 in 5 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4.7 leads 57.8 to 26.5.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 68.1% for GPT-5.5 Instant and 98.1% for Grok 4.7.

## Snapshot

| | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| Provider | OpenAI | xAI |
| Noometry Index | 42.7 | 53.1 |
| Rank | 110 | 37 |
| Context | — | 500K |
| Input $/M | — | $2 |
| Output $/M | — | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.5 Instant: 44.3 (#74)
- Grok 4.7: 58.0 (#18)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| SciCode | 48.6% | 57.8% |
| LMArena Coding | 1433 | 1427 |
| FrontierCode | — | 47.6% |
| CursorBench | — | 46.3% |
| LMArena WebDev | — | 1639 |
| FrontierSWE | — | 29.5% |

## Agentic & Tool Use

- GPT-5.5 Instant: —
- Grok 4.7: 36.7 (#37)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| APEX-Agents | — | 54.6% |
| GDP.pdf | — | 22.8% |
| Vending-Bench 2 | — | 10,537 |

## Reasoning

- GPT-5.5 Instant: 24.9 (#155)
- Grok 4.7: 49.1 (#40)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| CritPt | 0% | 18% |
| Chess Puzzles | 12% | 38% |
| LMArena Hard Prompts | 1426 | 1413 |
| Epoch Capabilities Index | 142.52 | 153.53 |
| NYT Connections (extended) | — | 76.8% |
| Mystery Game Puzzles | — | 29% |
| DTBench | — | 96% |
| LMCA | — | 49.4% |

## Math

- GPT-5.5 Instant: 26.5 (#259)
- Grok 4.7: 57.8 (#39)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 26.3% | 53% |
| FrontierMath Tier 4 | 2.4% | 17.1% |
| OTIS Mock AIME 2024-2025 | 68.1% | 98.1% |
| LMArena Math | 1420 | 1407 |
| ProofBench | — | 34% |

## Knowledge

- GPT-5.5 Instant: 48.9 (#74)
- Grok 4.7: 62.8 (#22)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| GPQA Diamond | 82.5% | 92.7% |
| LMArena Expert | 1409 | 1422 |
| SimpleQA Verified | — | 56% |

## Multimodal

- GPT-5.5 Instant: 40.0 (#52)
- Grok 4.7: 35.5 (#87)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Vision | 1250 | 1228 |
| Blueprint-Bench 2 | — | 32.5% |
| Furniture Assembly | — | 20.8% |
| LMArena Document | 1403 | — |

## Multilingual

- GPT-5.5 Instant: 52.8 (#80)
- Grok 4.7: 50.8 (#116)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Non-English | 1417 | 1389 |
| LMArena Chinese | 1456 | 1455 |
| LMArena French | 1428 | 1455 |
| LMArena Russian | 1431 | 1397 |
| LMArena Spanish | 1429 | 1400 |
| LMArena German | 1411 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1392 | — |

## Instruction Following

- GPT-5.5 Instant: 74.2 (#100)
- Grok 4.7: 74.1 (#105)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Instruction Following | 1406 | 1404 |

## Long Context

- GPT-5.5 Instant: 43.4 (#96)
- Grok 4.7: 43.1 (#104)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Longer Query | 1422 | 1413 |

## Writing & Preference

- GPT-5.5 Instant: 61.8 (#85)
- Grok 4.7: 70.0 (#24)

| Benchmark | GPT-5.5 Instant | Grok 4.7 |
|---|---|---|
| LMArena Text | 1419 | 1399 |
| LMArena Creative Writing | 1419 | 1391 |
| LMArena Multi-Turn | 1433 | 1393 |
| EQ-Bench Creative Writing | — | 2007 |

## FAQ

### Is GPT-5.5 Instant better than Grok 4.7?

Grok 4.7 is the stronger model overall, scoring 53.1 to 42.7 on the Noometry Index.

### Is GPT-5.5 Instant or Grok 4.7 better for coding?

Grok 4.7 scores higher on coding benchmarks: 58.0 versus 44.3 in the Noometry coding category.

### How many benchmarks do GPT-5.5 Instant and Grok 4.7 share?

23 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Grok 4.7 has 39.