# Claude Opus 5.5 vs Llama 2-70B

> Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 24.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-5-5-vs-llama-2-70b
- Last updated: 2026-10-10
- Shared benchmarks: 14

## Summary

- They share 14 benchmarks with published results for both. Claude Opus 5.5 scores higher in 8 categories and Llama 2-70B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Opus 5.5 leads 92.4 to 7.5.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Opus 5.5 and 0% for Llama 2-70B.
- Llama 2-70B has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 68.5 | 24.1 |
| Rank | 3 | 343 |
| Context | 1M | — |
| Input $/M | $4 | — |
| Output $/M | $20 | — |
| Weights | Proprietary | Open |

## Coding

- Claude Opus 5.5: 71.4 (#1)
- Llama 2-70B: 30.8 (#281)

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| LMArena Coding | 1545 | 1079 |
| FrontierCode | 54.4% | — |
| CursorBench | 57.8% | — |
| LMArena WebDev | 1820 | — |
| FrontierSWE | 62.3% | — |
| SciCode | 66.9% | — |
| MirrorCode | 77.4% | — |

## Agentic & Tool Use

- Claude Opus 5.5: 45.3 (#13)
- Llama 2-70B: —

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| APEX-Agents | 73.5% | — |
| GDP.pdf | 30.6% | — |

## Reasoning

- Claude Opus 5.5: 79.5 (#2)
- Llama 2-70B: 13.7 (#324)

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| LMArena Hard Prompts | 1545 | 1073 |
| DTBench | 98.9% | 41.6% |
| ARC-AGI-2 | 92.5% | — |
| NYT Connections (extended) | 88.5% | — |
| ARC-AGI-1 | 97.5% | — |
| CritPt | 31.7% | — |
| EBR-Bench | 71.4% | — |
| Mystery Game Puzzles | 71% | — |
| LMCA | 68.2% | — |
| BIG-Bench Hard | — | 64.9% |
| CommonsenseQA 2.0 | — | 50% |
| Epoch Capabilities Index | — | 113.59 |
| ForecastBench | — | 51.4 |
| HellaSwag | — | 85.3% |
| LAMBADA | — | 78.9% |
| PIQA | — | 82.8% |
| WinoGrande | — | 80.2% |

## Math

- Claude Opus 5.5: 92.4 (#2)
- Llama 2-70B: 7.5 (#320)

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 0% |
| FrontierMath (Tiers 1-3) | 91.2% | — |
| FrontierMath Tier 4 | 95% | — |
| ProofBench | 100% | — |
| LMArena Math | — | 1091 |
| MATH Level 5 | — | 3.3% |
| GSM8K | — | 69.6% |

## Knowledge

- Claude Opus 5.5: 66.6 (#9)
- Llama 2-70B: 7.4 (#305)

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| GPQA Diamond | 90.6% | 26.3% |
| LMArena Expert | 1564 | 1039 |
| SimpleQA Verified | 72.2% | — |
| ARC (AI2) Challenge | — | 78.3% |
| BoolQ | — | 88.6% |
| MMLU | — | 69.9% |
| OpenBookQA | — | 60.2% |
| TriviaQA | — | 87.6% |

## Multimodal

- Claude Opus 5.5: 56.5 (#2)
- Llama 2-70B: —

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| Furniture Assembly | 83.3% | — |

## Multilingual

- Claude Opus 5.5: 59.8 (#1)
- Llama 2-70B: 27.9 (#269)

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| LMArena Non-English | 1513 | 1045 |
| LMArena Chinese | 1572 | 994 |
| LMArena Russian | 1532 | 1083 |
| LMArena French | — | 1089 |
| LMArena German | — | 1041 |
| LMArena Japanese | — | 927 |
| LMArena Korean | — | 964 |
| LMArena Spanish | — | 1142 |

## Instruction Following

- Claude Opus 5.5: 80.1 (#2)
- Llama 2-70B: 55.1 (#273)

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| LMArena Instruction Following | 1535 | 1071 |

## Long Context

- Claude Opus 5.5: 47.3 (#18)
- Llama 2-70B: 32.2 (#265)

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| LMArena Longer Query | 1540 | 1062 |

## Writing & Preference

- Claude Opus 5.5: 78.7 (#3)
- Llama 2-70B: 32.5 (#274)

| Benchmark | Claude Opus 5.5 | Llama 2-70B |
|---|---|---|
| LMArena Text | 1518 | 1115 |
| LMArena Creative Writing | 1538 | 1075 |
| LMArena Multi-Turn | 1520 | 1088 |
| EQ-Bench Creative Writing | 2050 | — |

## FAQ

### Is Claude Opus 5.5 better than Llama 2-70B?

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 24.1 on the Noometry Index.

### Is Claude Opus 5.5 or Llama 2-70B better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.4 versus 30.8 in the Noometry coding category.

### How many benchmarks do Claude Opus 5.5 and Llama 2-70B share?

14 benchmarks have published results for both models. Claude Opus 5.5 has 35 scored results on Noometry and Llama 2-70B has 35.