GPT-5.3-Codex vs GPT-5.1
GPT-5.1 is cheaper on output tokens. Choose GPT-5.3-Codex or GPT-5.1 based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.3-Codex | GPT-5.1 |
|---|---|---|
| Provider | Poe | Poe |
| Input / 1M tokens | $1.60 | $1.10 |
| Output / 1M tokens | $13.00 | $9.00 |
| Context window | 400K | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Feb 2026 | Nov 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.