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A side-by-side comparison of GPT-5.4 and gpt-oss-20b, using the lowest price and highest limits found across every provider that offers each model.
| GPT-5.4 | gpt-oss-20b | |
|---|---|---|
| Providers | 55 | 49 |
| Cheapest input ($/M) | $0.376 via QiHang AI | $0 via FastRouter |
| Cheapest output ($/M) | $2.2559 via QiHang AI | $0 via FastRouter |
| Max context | 1.1M | 131.1K |
| Max output | 131.1K | 131.1K |
| Released | Feb 26, 2026 | Jul 18, 2025 |
| Open weights | No | Yes |
| Features | ReasoningToolsStructured outputFilesTemperature | ReasoningToolsStructured outputTemperature |
| Input modalities | ImageText | Text |
| Output modalities | Text | Text |