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A side-by-side comparison of Claude Fable 5.1 and Claude Sonnet 5.5, using the lowest price and highest limits found across every provider that offers each model.
| Claude Fable 5.1 | Claude Sonnet 5.5 | |
|---|---|---|
| Providers | 50 | 55 |
| Cheapest input ($/M) | $0.94 via Api.Airforce | $0.2 via Api.Airforce |
| Cheapest output ($/M) | $4.71 via Api.Airforce | $1 via Api.Airforce |
| Max context | 1M | 1M |
| Max output | 128K | 1M |
| Released | Aug 28, 2026 | Sep 26, 2026 |
| Open weights | No | No |
| Features | ReasoningToolsStructured outputFiles | ReasoningToolsStructured outputFiles |
| Input modalities | FileImageText | FileImageText |
| Output modalities | Text | Text |