GPT-5 Pro vs Llama 3.1 8B Instruct
OpenAI vs Meta — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Pro has the higher intelligence index (88.4 vs 45)
- •Llama 3.1 8B Instruct is cheaper ($0.02 vs $15.00 per 1M input)
- •GPT-5 Pro has a larger context window (400K)
| GPT-5 Pro | Llama 3.1 8B Instruct | |
|---|---|---|
| Intelligence index | 88.4 | 45 |
| Developer | OpenAI | Meta |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 131,072 tokens |
| Input price | $15.00 / 1M | $0.02 / 1M |
| Output price | $120.00 / 1M | $0.05 / 1M |
| Speed | — | 2047 tok/s |
| Released | October 6, 2025 | July 23, 2024 |
| Parameters | — | — |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5 Pro
Llama 3.1 8B Instruct
GPQA Diamond
88.4
30.4
Humanity’s Last Exam
42
5.1