# GPT-5.5 Pro vs Llama 13b

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 23.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-5-pro-vs-llama-13b
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-5.5 Pro scores higher in 2 categories and Llama 13b in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.6 to 13.4.
- Llama 13b has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 64.3 | 23.9 |
| Rank | 7 | 344 |
| Context | 1.05M | — |
| Input $/M | $30 | — |
| Output $/M | $180 | — |
| Weights | Proprietary | Open |

## Coding

- GPT-5.5 Pro: —
- Llama 13b: 20.9 (#332)

| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| LMArena Coding | — | 683 |

## Reasoning

- GPT-5.5 Pro: 73.6 (#7)
- Llama 13b: 13.4 (#327)

| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| Epoch Capabilities Index | 162.45 | 100.09 |
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMArena Hard Prompts | — | 728 |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| BIG-Bench Hard | — | 37.9% |
| HellaSwag | — | 79.2% |
| LAMBADA | — | 75.2% |
| PIQA | — | 80.1% |
| WinoGrande | — | 73% |

## Math

- GPT-5.5 Pro: 83.8 (#8)
- Llama 13b: 24.4 (#259)

| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| LMArena Math | — | 838 |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
| GSM8K | — | 20.6% |

## Knowledge

- GPT-5.5 Pro: 64.2 (#17)
- Llama 13b: —

| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| GPQA Diamond | 93.9% | — |
| ARC (AI2) Challenge | — | 52.7% |
| BoolQ | — | 78.7% |
| MMLU | — | 47.7% |
| OpenBookQA | — | 56.4% |
| TriviaQA | — | 77.9% |

## Multimodal

- GPT-5.5 Pro: —
- Llama 13b: —

| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| ScienceQA | — | 43.3% |

## Multilingual

- GPT-5.5 Pro: —
- Llama 13b: 16.8 (#292)

| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| LMArena Non-English | — | 819 |

## Instruction Following

- GPT-5.5 Pro: —
- Llama 13b: 36.9 (#300)

| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| LMArena Instruction Following | — | 781 |

## Writing & Preference

- GPT-5.5 Pro: —
- Llama 13b: 13.9 (#307)

| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| LMArena Text | — | 834 |
| LMArena Creative Writing | — | 794 |
| LMArena Multi-Turn | — | 753 |

## FAQ

### Is GPT-5.5 Pro better than Llama 13b?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 23.9 on the Noometry Index.

### How many benchmarks do GPT-5.5 Pro and Llama 13b share?

1 benchmark has published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Llama 13b has 21.