GPT-5.1-Codex vs Grok-3 Mini
OpenAI vs xAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1-Codex has the higher intelligence index (88.2 vs 85.9)
- •Grok-3 Mini is cheaper ($0.30 vs $1.25 per 1M input)
- •GPT-5.1-Codex is faster
- •GPT-5.1-Codex has a larger context window (400K)
| GPT-5.1-Codex | Grok-3 Mini | |
|---|---|---|
| Intelligence index | 88.2 | 85.9 |
| Developer | OpenAI | xAI |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 400,000 tokens | 128,000 tokens |
| Input price | $1.25 / 1M | $0.30 / 1M |
| Output price | $10.00 / 1M | $0.50 / 1M |
| Speed | 188 tok/s | 100 tok/s |
| Released | November 13, 2025 | February 17, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.1-Codex
Grok-3 Mini
AIME 2025
95.7
90.8
GPQA Diamond
86
84
LiveCodeBench
84.9
80.4