# Claude Sonnet 5.5 vs Grok 4.7

> Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 53.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-grok-4-7
- Last updated: 2026-10-12
- Shared benchmarks: 30

## Summary

- They share 30 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 9 categories and Grok 4.7 in 1 category; 10 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 57.8.
- The biggest single-benchmark swing is ProofBench: 100% for Claude Sonnet 5.5 and 34% for Grok 4.7.
- Grok 4.7 is cheaper at $2 / $6 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 500K.

## Snapshot

| | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 61.9 | 53.1 |
| Rank | 10 | 37 |
| Context | 1M | 500K |
| Input $/M | $2 | $2 |
| Output $/M | $10 | $6 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Sonnet 5.5: 67.3 (#6)
- Grok 4.7: 58.0 (#18)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| FrontierCode | 52.1% | 47.6% |
| CursorBench | 55.5% | 46.3% |
| LMArena WebDev | 1774 | 1639 |
| FrontierSWE | 61.9% | 29.5% |
| SciCode | 61% | 57.8% |
| LMArena Coding | 1513 | 1427 |
| ALE-Bench | 1,819 | — |

## Agentic & Tool Use

- Claude Sonnet 5.5: 45.0 (#16)
- Grok 4.7: 36.7 (#37)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| APEX-Agents | 75.5% | 54.6% |
| GDP.pdf | — | 22.8% |
| Vending-Bench 2 | — | 10,537 |

## Reasoning

- Claude Sonnet 5.5: 54.0 (#28)
- Grok 4.7: 49.1 (#40)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| NYT Connections (extended) | 80.5% | 76.8% |
| CritPt | 31.4% | 18% |
| LMArena Hard Prompts | 1495 | 1413 |
| Mystery Game Puzzles | 65% | 29% |
| Epoch Capabilities Index | 165.03 | 153.53 |
| Chess Puzzles | — | 38% |
| DTBench | — | 96% |
| LMCA | — | 49.4% |

## Math

- Claude Sonnet 5.5: 87.9 (#6)
- Grok 4.7: 57.8 (#39)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | 53% |
| FrontierMath Tier 4 | 80.5% | 17.1% |
| OTIS Mock AIME 2024-2025 | 100% | 98.1% |
| ProofBench | 100% | 34% |
| LMArena Math | 1510 | 1407 |
| FrontierMath Erdős | 2.9% | — |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#12)
- Grok 4.7: 62.8 (#22)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| GPQA Diamond | 95.6% | 92.7% |
| SimpleQA Verified | 46.5% | 56% |
| LMArena Expert | 1540 | 1422 |

## Multimodal

- Claude Sonnet 5.5: 51.5 (#6)
- Grok 4.7: 35.5 (#87)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| LMArena Vision | 1289 | 1228 |
| Furniture Assembly | 75% | 20.8% |
| Blueprint-Bench 2 | — | 32.5% |

## Multilingual

- Claude Sonnet 5.5: 55.3 (#30)
- Grok 4.7: 50.8 (#116)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| LMArena Non-English | 1452 | 1389 |
| LMArena Chinese | 1522 | 1455 |
| LMArena Russian | 1451 | 1397 |
| LMArena French | — | 1455 |
| LMArena Spanish | — | 1400 |

## Instruction Following

- Claude Sonnet 5.5: 78.3 (#11)
- Grok 4.7: 74.1 (#105)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| LMArena Instruction Following | 1495 | 1404 |

## Long Context

- Claude Sonnet 5.5: 45.9 (#28)
- Grok 4.7: 43.1 (#104)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| LMArena Longer Query | 1498 | 1413 |

## Writing & Preference

- Claude Sonnet 5.5: 66.0 (#40)
- Grok 4.7: 70.0 (#24)

| Benchmark | Claude Sonnet 5.5 | Grok 4.7 |
|---|---|---|
| LMArena Text | 1471 | 1399 |
| LMArena Creative Writing | 1465 | 1391 |
| LMArena Multi-Turn | 1474 | 1393 |
| EQ-Bench Creative Writing | — | 2007 |

## FAQ

### Is Claude Sonnet 5.5 better than Grok 4.7?

Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 53.1 on the Noometry Index.

### Which is cheaper, Claude Sonnet 5.5 or Grok 4.7?

Grok 4.7 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

### Is Claude Sonnet 5.5 or Grok 4.7 better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 67.3 versus 58.0 in the Noometry coding category.

### Which has the bigger context window?

Claude Sonnet 5.5 does, with 1M tokens against 500K.

### How many benchmarks do Claude Sonnet 5.5 and Grok 4.7 share?

30 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Grok 4.7 has 39.