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A side-by-side comparison of GPT-5.5 and Kimi K3.1 Pro, using the lowest price and highest limits found across every provider that offers each model.
| GPT-5.5 | Kimi K3.1 Pro | |
|---|---|---|
| Providers | 53 | 46 |
| Cheapest input ($/M) | $0.75 via UnoRouter | $0.36 via UnoRouter |
| Cheapest output ($/M) | $4.5 via UnoRouter | $1.8 via UnoRouter |
| Max context | 1.1M | 1M |
| Max output | 131.1K | 1M |
| Released | Apr 22, 2026 | Oct 23, 2026 |
| Open weights | No | Yes |
| Features | ReasoningToolsStructured outputFiles | ReasoningToolsStructured outputFiles |
| Input modalities | ImageText | ImageTextVideo |
| Output modalities | Text | Text |