GPT-5 Pro vs Llama 3.1 405B
OpenAI vs Meta — benchmarks, pricing, and capabilities side by side.
- •GPT-5 Pro has a larger context window (400K)
| GPT-5 Pro | Llama 3.1 405B | |
|---|---|---|
| Intelligence index | 88.4 | — |
| Developer | OpenAI | Meta |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 128,000 tokens |
| Input price | $15.00 / 1M | — |
| Output price | $120.00 / 1M | — |
| Speed | — | — |
| Released | October 6, 2025 | July 23, 2024 |
| Parameters | — | 405B |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |