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A side-by-side comparison of Claude Sonnet 4.5 and GPT-5.4, using the lowest price and highest limits found across every provider that offers each model.
| Claude Sonnet 4.5 | GPT-5.4 | |
|---|---|---|
| Providers | 34 | 55 |
| Cheapest input ($/M) | $0.4647 via DaoXE | $0.376 via QiHang AI |
| Cheapest output ($/M) | $2.3236 via DaoXE | $2.2559 via QiHang AI |
| Max context | 1M | 1.1M |
| Max output | 64K | 131.1K |
| Released | Sep 26, 2025 | Feb 26, 2026 |
| Open weights | No | No |
| Features | ReasoningToolsStructured outputFilesTemperature | ReasoningToolsStructured outputFilesTemperature |
| Input modalities | FileImageText | ImageText |
| Output modalities | Text | Text |