# Claude Opus 4.1 vs Llama 13b

> Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 23.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-llama-13b
- Last updated: 2026-10-10
- Shared benchmarks: 9

## Summary

- They share 9 benchmarks with published results for both. Claude Opus 4.1 scores higher in 5 categories and Llama 13b in 1 category; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Claude Opus 4.1 leads 62.6 to 13.9.
- Llama 13b has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| Provider | Anthropic | Meta |
| Noometry Index | 40.8 | 23.9 |
| Rank | 136 | 344 |
| Context | 200K | — |
| Input $/M | $15 | — |
| Output $/M | $75 | — |
| Weights | Proprietary | Open |

## Coding

- Claude Opus 4.1: 44.3 (#69)
- Llama 13b: 20.9 (#332)

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| LMArena Coding | 1479 | 683 |
| SWE-bench Verified | 73.3% | — |
| LMArena WebDev | 1390 | — |
| WeirdML | 45.9% | — |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |

## Agentic & Tool Use

- Claude Opus 4.1: 34.8 (#38)
- Llama 13b: —

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| Terminal-Bench | 38% | — |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |

## Reasoning

- Claude Opus 4.1: 31.6 (#70)
- Llama 13b: 13.4 (#327)

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| LMArena Hard Prompts | 1443 | 728 |
| Epoch Capabilities Index | 144.11 | 100.09 |
| SimpleBench | 60% | — |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| BIG-Bench Hard | — | 37.9% |
| ForecastBench | 62 | — |
| HellaSwag | — | 79.2% |
| LAMBADA | — | 75.2% |
| PIQA | — | 80.1% |
| WinoGrande | — | 73% |

## Math

- Claude Opus 4.1: 22.0 (#267)
- Llama 13b: 24.4 (#259)

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| LMArena Math | 1430 | 838 |
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
| GSM8K | — | 20.6% |

## Knowledge

- Claude Opus 4.1: 41.9 (#93)
- Llama 13b: —

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |
| LMArena Expert | 1439 | — |
| ARC (AI2) Challenge | — | 52.7% |
| BoolQ | — | 78.7% |
| MMLU | — | 47.7% |
| OpenBookQA | — | 56.4% |
| TriviaQA | — | 77.9% |

## Multimodal

- Claude Opus 4.1: 26.2 (#114)
- Llama 13b: —

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| VPCT | 35% | — |
| ScienceQA | — | 43.3% |

## Multilingual

- Claude Opus 4.1: 52.1 (#90)
- Llama 13b: 16.8 (#292)

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| LMArena Non-English | 1405 | 819 |
| LMArena Chinese | 1427 | — |
| LMArena French | 1432 | — |
| LMArena German | 1412 | — |
| LMArena Japanese | 1378 | — |
| LMArena Korean | 1381 | — |
| LMArena Russian | 1421 | — |
| LMArena Spanish | 1448 | — |

## Instruction Following

- Claude Opus 4.1: 75.8 (#53)
- Llama 13b: 36.9 (#300)

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| LMArena Instruction Following | 1436 | 781 |

## Long Context

- Claude Opus 4.1: 44.5 (#60)
- Llama 13b: —

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| LMArena Longer Query | 1455 | — |

## Writing & Preference

- Claude Opus 4.1: 62.6 (#70)
- Llama 13b: 13.9 (#307)

| Benchmark | Claude Opus 4.1 | Llama 13b |
|---|---|---|
| LMArena Text | 1419 | 834 |
| LMArena Creative Writing | 1412 | 794 |
| LMArena Multi-Turn | 1444 | 753 |
| Short-Story Creative Writing | 84.7% | — |

## FAQ

### Is Claude Opus 4.1 better than Llama 13b?

Claude Opus 4.1 is the stronger model overall, scoring 40.8 to 23.9 on the Noometry Index.

### Is Claude Opus 4.1 or Llama 13b better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.3 versus 20.9 in the Noometry coding category.

### How many benchmarks do Claude Opus 4.1 and Llama 13b share?

9 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Llama 13b has 21.