# Claude Sonnet 5.5 vs Grok-2 (Dec 2024)

> Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 33.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-grok-2
- Last updated: 2026-10-10
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 4 categories and Grok-2 (Dec 2024) in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 19.6.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Sonnet 5.5 and 11.5% for Grok-2 (Dec 2024).

## Snapshot

| | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 60.5 | 33.4 |
| Rank | 10 | 233 |
| Context | 1M | — |
| Input $/M | $2 | — |
| Output $/M | $10 | — |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Sonnet 5.5: 65.5 (#6)
- Grok-2 (Dec 2024): 32.9 (#254)

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| WeirdML | — | 22.2% |
| LiveBench Coding | — | 46.4% |
| LMArena Coding | — | 1288 |
| ALE-Bench | 1,819 | — |

## Agentic & Tool Use

- Claude Sonnet 5.5: 44.9 (#14)
- Grok-2 (Dec 2024): —

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| APEX-Agents | 75.5% | — |

## Reasoning

- Claude Sonnet 5.5: 52.4 (#29)
- Grok-2 (Dec 2024): 16.4 (#294)

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| SimpleBench | — | 22.7% |
| CritPt | 31.4% | — |
| LiveBench Reasoning | — | 54.8% |
| LMArena Hard Prompts | — | 1272 |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 65.2% |
| LiveBench Data Analysis | — | 54.5% |
| Epoch Capabilities Index | — | 130.48 |
| LiveBench | — | 54.3% |

## Math

- Claude Sonnet 5.5: 88.7 (#4)
- Grok-2 (Dec 2024): 19.6 (#278)

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 11.5% |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| ProofBench | 100% | — |
| LiveBench Math | — | 54.9% |
| LMArena Math | — | 1283 |
| MATH Level 5 | — | 63.5% |
| FrontierMath (Feb 2025 set) | — | 0.7% |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#11)
- Grok-2 (Dec 2024): 29.8 (#225)

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| GPQA Diamond | 95.6% | 53.8% |
| SimpleQA Verified | 46.5% | — |
| Confabulations | — | 20.1% |
| LMArena Expert | — | 1254 |

## Multimodal

- Claude Sonnet 5.5: 53.2 (#5)
- Grok-2 (Dec 2024): —

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| Furniture Assembly | 75% | — |

## Multilingual

- Claude Sonnet 5.5: —
- Grok-2 (Dec 2024): 43.3 (#183)

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Non-English | — | 1282 |
| LMArena Chinese | — | 1289 |
| LMArena French | — | 1317 |
| LMArena German | — | 1287 |
| LMArena Japanese | — | 1244 |
| LMArena Korean | — | 1237 |
| LMArena Russian | — | 1286 |
| LMArena Spanish | — | 1281 |

## Instruction Following

- Claude Sonnet 5.5: —
- Grok-2 (Dec 2024): 67.1 (#197)

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| LiveBench Instruction Following | — | 69.6% |
| LMArena Instruction Following | — | 1270 |

## Long Context

- Claude Sonnet 5.5: —
- Grok-2 (Dec 2024): 38.7 (#186)

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Longer Query | — | 1276 |

## Writing & Preference

- Claude Sonnet 5.5: —
- Grok-2 (Dec 2024): 48.8 (#192)

| Benchmark | Claude Sonnet 5.5 | Grok-2 (Dec 2024) |
|---|---|---|
| LMArena Text | — | 1305 |
| LMArena Creative Writing | — | 1284 |
| Short-Story Creative Writing | — | 63.6% |
| LMArena Multi-Turn | — | 1290 |
| LiveBench Language | — | 45.6% |

## FAQ

### Is Claude Sonnet 5.5 better than Grok-2 (Dec 2024)?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 33.4 on the Noometry Index.

### Is Claude Sonnet 5.5 or Grok-2 (Dec 2024) better for coding?

Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 32.9 in the Noometry coding category.

### How many benchmarks do Claude Sonnet 5.5 and Grok-2 (Dec 2024) share?

2 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Grok-2 (Dec 2024) has 34.