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A side-by-side comparison of GPT-6 Astra and Grok 4.3, using the lowest price and highest limits found across every provider that offers each model.
| GPT-6 Astra | Grok 4.3 | |
|---|---|---|
| Providers | 58 | 42 |
| Cheapest input ($/M) | $1 via Api.Airforce | $0.0312 via routing.run |
| Cheapest output ($/M) | $2.25 via KiosAPI | $0.0623 via routing.run |
| Max context | 1.1M | 1M |
| Max output | 128K | 1M |
| Released | Aug 27, 2026 | Apr 17, 2026 |
| Open weights | No | No |
| Features | ReasoningToolsStructured outputFiles | ReasoningToolsStructured outputFilesTemperature |
| Input modalities | FileImageText | ImageText |
| Output modalities | Text | Text |