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A side-by-side comparison of GPT-5.1 and GPT-6 Astra, using the lowest price and highest limits found across every provider that offers each model.
| GPT-5.1 | GPT-6 Astra | |
|---|---|---|
| Providers | 43 | 58 |
| Cheapest input ($/M) | $0.1936 via DaoXE | $1 via Api.Airforce |
| Cheapest output ($/M) | $1.5491 via DaoXE | $2.25 via KiosAPI |
| Max context | 400K | 1.1M |
| Max output | 128K | 128K |
| Released | Nov 1, 2025 | Aug 27, 2026 |
| Open weights | No | No |
| Features | ReasoningToolsStructured outputFilesTemperature | ReasoningToolsStructured outputFiles |
| Input modalities | ImageText | FileImageText |
| Output modalities | Text | Text |