GPT-5.3-Codex vs Nova Pro
OpenAI vs Amazon — benchmarks, pricing, and capabilities side by side.
- •GPT-5.3-Codex has the higher intelligence index (91.5 vs 61.6)
- •Nova Pro is cheaper ($0.80 vs $1.75 per 1M input)
- •Nova Pro is faster
- •GPT-5.3-Codex has a larger context window (400K)
| GPT-5.3-Codex | Nova Pro | |
|---|---|---|
| Intelligence index | 91.5 | 61.6 |
| Developer | OpenAI | Amazon |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 400,000 tokens | 300,000 tokens |
| Input price | $1.75 / 1M | $0.80 / 1M |
| Output price | $14.00 / 1M | $3.20 / 1M |
| Speed | 73 tok/s | 100 tok/s |
| Released | February 24, 2026 | November 20, 2024 |
| Parameters | — | — |
| Input modalities | Text, Image | — |
| Output modalities | Text | — |
Shared benchmarks
GPT-5.3-Codex
Nova Pro
GPQA Diamond
91.5
46.9
Humanity’s Last Exam
39.9
3.4