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A side-by-side comparison of OpenAI: GPT-5.3-Codex and OpenAI: GPT-5 Nano, using the lowest price and highest limits found across every provider that offers each model.
| OpenAI: GPT-5.3-Codex | OpenAI: GPT-5 Nano | |
|---|---|---|
| Providers | 41 | 43 |
| Cheapest input ($/M) | $0.1504 via QiHang AI | $0.0075 via QiHang AI |
| Cheapest output ($/M) | $1.2031 via QiHang AI | $0.0602 via QiHang AI |
| Max context | 512K | 400K |
| Max output | 128K | 360K |
| Released | Feb 5, 2026 | Nov 20, 2024 |
| Open weights | No | No |
| Features | ReasoningToolsStructured outputFiles | ReasoningToolsStructured outputFiles |
| Input modalities | ImageText | ImageText |
| Output modalities | Text | Text |