Model comparison
GPT-5.5 Pro vs Llama 13b
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 24.4 on the Noometry Index.
Last verified . 1 shared benchmarks.
MetaSummary
- 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 73.3 to 14.0.
- Llama 13b has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Llama 13b | |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 64.3 | 24.4 |
| Released | 2026-04-23 | 2023-02-24 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $30 | — |
| Output $ / M tokens | $180 | — |
| Results tracked | 14 | 21 |
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Category by category
Coding Not comparable
GPT-5.5 Pro: —, Llama 13b: 21.4 (#337)
| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| LMArena Coding | — | 683 |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Llama 13b: 14.0 (#329)
| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| Epoch Capabilities Index | 162.07 | 100.58 |
| 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 leads
GPT-5.5 Pro: 84.0 (#10), Llama 13b: 26.7 (#256)
| 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 Not comparable
GPT-5.5 Pro: 64.1 (#19), 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 Not comparable
GPT-5.5 Pro: —, Llama 13b: —
| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| ScienceQA | — | 43.3% |
Multilingual Not comparable
GPT-5.5 Pro: —, Llama 13b: 16.6 (#297)
| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| LMArena Non-English | — | 819 |
Instruction Following Not comparable
GPT-5.5 Pro: —, Llama 13b: 36.7 (#305)
| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| LMArena Instruction Following | — | 781 |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Llama 13b: 13.8 (#312)
| Benchmark | GPT-5.5 Pro | Llama 13b |
|---|---|---|
| LMArena Text | — | 834 |
| LMArena Creative Writing | — | 794 |
| LMArena Multi-Turn | — | 753 |
Frequently asked questions
Is GPT-5.5 Pro better than Llama 13b?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 24.4 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.