GPT-5.1 vs Grok-1
OpenAI vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok-1 is cheaper ($0.00 vs $1.25 per 1M input)
| GPT-5.1 | Grok-1 | |
|---|---|---|
| Intelligence index | 89 | — |
| Developer | OpenAI | xAI |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | — |
| Input price | $1.25 / 1M | $0.00 / 1M |
| Output price | $10.00 / 1M | $0.00 / 1M |
| Speed | 115 tok/s | — |
| Released | November 12, 2025 | November 4, 2023 |
| Parameters | — | 314B total (MoE) |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |