# Claude 2 vs Claude Opus 4

> Claude Opus 4 is the stronger model overall, scoring 42.9 to 24.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-2-vs-claude-opus-4
- Last updated: 2026-10-10
- Shared benchmarks: 5

## Summary

- They share 5 benchmarks with published results for both. Claude 2 scores higher in 0 categories and Claude Opus 4 in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 4 leads 40.2 to 8.7.
- The biggest single-benchmark swing is MATH Level 5: 11.7% for Claude 2 and 85% for Claude Opus 4.

## Snapshot

| | Claude 2 | Claude Opus 4 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 24.7 | 42.9 |
| Rank | 342 | 93 |
| Context | — | 200K |
| Input $/M | — | $15 |
| Output $/M | — | $75 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 2: —
- Claude Opus 4: 47.8 (#55)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| SWE-bench Verified | — | 70.7% |
| SWE-bench Verified (bash only) | — | 67.6% |
| Aider Polyglot | — | 72% |
| GSO | — | 6.9% |
| WeirdML | — | 43.7% |
| LMArena Coding | — | 1442 |
| AlgoTune | — | 1.33 |
| HumanEval+ | 61.6% | — |

## Agentic & Tool Use

- Claude 2: —
- Claude Opus 4: 34.5 (#39)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| Cybench | — | 38% |
| DeepResearch Bench | — | 46.8% |
| LMArena Search | — | 1127 |
| METR Time Horizons | — | 63.9% |

## Reasoning

- Claude 2: 20.8 (#213)
- Claude Opus 4: 27.4 (#104)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| DTBench | 51.9% | 81.6% |
| Epoch Capabilities Index | 120.08 | 142.67 |
| ARC-AGI-2 | — | 8.6% |
| SimpleBench | — | 58.8% |
| Kagi LLM Benchmark | — | 74.3% |
| ARC-AGI-1 | — | 35.7% |
| CritPt | — | 0.3% |
| EnigmaEval | — | 5.6% |
| LMArena Hard Prompts | — | 1399 |
| LMCA | — | 37.4% |
| ForecastBench | — | 61.1 |

## Math

- Claude 2: 8.7 (#314)
- Claude Opus 4: 40.2 (#80)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.5% | 64.4% |
| MATH Level 5 | 11.7% | 85% |
| Omni-MATH | — | 61.6% |
| LMArena Math | — | 1391 |
| FrontierMath (Feb 2025 set) | — | 4.5% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Claude 2: 17.0 (#282)
- Claude Opus 4: 43.9 (#82)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| GPQA Diamond | 34.7% | 76.3% |
| Humanity's Last Exam | — | 10.7% |
| MMLU-Pro | — | 87.5% |
| Confabulations | — | 15.9% |
| Vectara Hallucination Rate | — | 12% |
| GPQA (HELM) | — | 70.8% |
| LMArena Expert | — | 1384 |
| MMLU | 78.5% | — |
| TriviaQA | 87.5% | — |

## Multimodal

- Claude 2: —
- Claude Opus 4: 30.9 (#101)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| LMArena Vision | — | 1192 |
| GeoBench | — | 49% |
| VPCT | — | 38% |

## Multilingual

- Claude 2: —
- Claude Opus 4: 49.0 (#133)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| LMArena Non-English | — | 1362 |
| LMArena Chinese | — | 1386 |
| LMArena French | — | 1370 |
| LMArena German | — | 1391 |
| LMArena Japanese | — | 1332 |
| LMArena Korean | — | 1318 |
| LMArena Russian | — | 1392 |
| LMArena Spanish | — | 1388 |

## Instruction Following

- Claude 2: —
- Claude Opus 4: 77.3 (#26)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| IFEval | — | 91.8% |
| LMArena Instruction Following | — | 1406 |

## Long Context

- Claude 2: —
- Claude Opus 4: 39.5 (#167)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| Fiction.LiveBench | — | 61.1% |
| LMArena Longer Query | — | 1422 |

## Writing & Preference

- Claude 2: —
- Claude Opus 4: 61.4 (#85)

| Benchmark | Claude 2 | Claude Opus 4 |
|---|---|---|
| LMArena Text | — | 1377 |
| LMArena Creative Writing | — | 1386 |
| Short-Story Creative Writing | — | 83.6% |
| EQ-Bench Creative Writing | — | 1580 |
| WildBench | — | 85.2% |
| LMArena Multi-Turn | — | 1396 |

## FAQ

### Is Claude 2 better than Claude Opus 4?

Claude Opus 4 is the stronger model overall, scoring 42.9 to 24.7 on the Noometry Index.

### How many benchmarks do Claude 2 and Claude Opus 4 share?

5 benchmarks have published results for both models. Claude 2 has 8 scored results on Noometry and Claude Opus 4 has 56.