GPT-5.1-Codex vs Nova Pro
OpenAI vs Amazon — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1-Codex has the higher intelligence index (88.2 vs 61.6)
- •Nova Pro is cheaper ($0.80 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 | Nova Pro | |
|---|---|---|
| Intelligence index | 88.2 | 61.6 |
| Developer | OpenAI | Amazon |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 400,000 tokens | 300,000 tokens |
| Input price | $1.25 / 1M | $0.80 / 1M |
| Output price | $10.00 / 1M | $3.20 / 1M |
| Speed | 188 tok/s | 100 tok/s |
| Released | November 13, 2025 | November 20, 2024 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.1-Codex
Nova Pro
AIME 2025
95.7
7
GPQA Diamond
86
46.9
Humanity’s Last Exam
23.4
3.4
LiveCodeBench
84.9
23.3
MMLU-Pro
86
69.1