# Claude 2.1 vs Grok 4.3

> Grok 4.3 is the stronger model overall, scoring 43.6 to 24.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-1-vs-grok-4-3
- Last updated: 2026-10-10
- Shared benchmarks: 6

## Summary

- They share 6 benchmarks with published results for both. Claude 2.1 scores higher in 0 categories and Grok 4.3 in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.3 leads 52.5 to 15.5.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.9% for Claude 2.1 and 93.3% for Grok 4.3.

## Snapshot

| | Claude 2.1 | Grok 4.3 |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 24.9 | 43.6 |
| Rank | 340 | 80 |
| Context | — | 1M |
| Input $/M | — | $1.25 |
| Output $/M | — | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 2.1: 25.8 (#322)
- Grok 4.3: 41.3 (#117)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| WeirdML | 7.1% | 49.9% |
| LMArena WebDev | — | 1357 |
| SciCode | — | 47.3% |
| LMArena Coding | — | 1415 |
| ALE-Bench | — | 944.17 |

## Agentic & Tool Use

- Claude 2.1: —
- Grok 4.3: 27.6 (#93)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| GDP.pdf | — | 8% |
| LMArena Search | — | 1165 |
| Vending-Bench 2 | — | 35.26 |

## Reasoning

- Claude 2.1: 20.6 (#216)
- Grok 4.3: 34.9 (#60)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| DTBench | 51% | 90.7% |
| Epoch Capabilities Index | 119.22 | 149.13 |
| ForecastBench | 54.2 | 60.3 |
| NYT Connections (extended) | — | 55.2% |
| CritPt | — | 8% |
| Chess Puzzles | — | 25% |
| LMArena Hard Prompts | — | 1397 |
| LMCA | — | 38.3% |

## Math

- Claude 2.1: 9.6 (#309)
- Grok 4.3: 45.8 (#60)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.9% | 93.3% |
| FrontierMath (Tiers 1-3) | — | 42.8% |
| FrontierMath Tier 4 | — | 14.6% |
| ProofBench | — | 11% |
| LMArena Math | — | 1388 |

## Knowledge

- Claude 2.1: 15.5 (#287)
- Grok 4.3: 52.5 (#57)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| GPQA Diamond | 33% | 88.8% |
| SimpleQA Verified | — | 33.2% |
| LMArena Expert | — | 1385 |
| MMLU | 73.5% | — |

## Multimodal

- Claude 2.1: —
- Grok 4.3: 31.6 (#96)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| LMArena Vision | — | 1231 |
| Blueprint-Bench 2 | — | 0% |

## Multilingual

- Claude 2.1: —
- Grok 4.3: 50.7 (#114)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| LMArena Non-English | — | 1385 |
| LMArena Chinese | — | 1423 |
| LMArena French | — | 1412 |
| LMArena German | — | 1395 |
| LMArena Japanese | — | 1379 |
| LMArena Korean | — | 1357 |
| LMArena Russian | — | 1399 |
| LMArena Spanish | — | 1402 |

## Instruction Following

- Claude 2.1: —
- Grok 4.3: 72.3 (#135)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| LMArena Instruction Following | — | 1366 |

## Long Context

- Claude 2.1: —
- Grok 4.3: 42.5 (#118)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| LMArena Longer Query | — | 1393 |

## Writing & Preference

- Claude 2.1: —
- Grok 4.3: 58.6 (#112)

| Benchmark | Claude 2.1 | Grok 4.3 |
|---|---|---|
| LMArena Text | — | 1397 |
| LMArena Creative Writing | — | 1380 |
| EQ-Bench 4 | — | 1075 |
| LMArena Multi-Turn | — | 1406 |

## FAQ

### Is Claude 2.1 better than Grok 4.3?

Grok 4.3 is the stronger model overall, scoring 43.6 to 24.9 on the Noometry Index.

### Is Claude 2.1 or Grok 4.3 better for coding?

Grok 4.3 scores higher on coding benchmarks: 41.3 versus 25.8 in the Noometry coding category.

### How many benchmarks do Claude 2.1 and Grok 4.3 share?

6 benchmarks have published results for both models. Claude 2.1 has 7 scored results on Noometry and Grok 4.3 has 40.