GPT-5.1-Codex vs GPT-5.4 Pro
OpenAI vs OpenAI — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1-Codex is cheaper ($1.25 vs $30.00 per 1M input)
- •GPT-5.4 Pro has a larger context window (1.1M)
| GPT-5.1-Codex | GPT-5.4 Pro | |
|---|---|---|
| Intelligence index | 88.2 | — |
| Developer | OpenAI | OpenAI |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 400,000 tokens | 1,050,000 tokens |
| Input price | $1.25 / 1M | $30.00 / 1M |
| Output price | $10.00 / 1M | $180.00 / 1M |
| Speed | 188 tok/s | — |
| Released | November 13, 2025 | March 5, 2026 |
| Parameters | — | — |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |