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A side-by-side comparison of GPT-5.5 and GPT-5.6 Terra, using the lowest price and highest limits found across every provider that offers each model.
| GPT-5.5 | GPT-5.6 Terra | |
|---|---|---|
| Providers | 53 | 58 |
| Cheapest input ($/M) | $0.75 via UnoRouter | $0.2924 via NaraRouter |
| Cheapest output ($/M) | $4.5 via UnoRouter | $1.7547 via NaraRouter |
| Max context | 1.1M | 1.1M |
| Max output | 131.1K | 128K |
| Released | Apr 22, 2026 | May 1, 2026 |
| Open weights | No | No |
| Features | ReasoningToolsStructured outputFiles | ReasoningToolsStructured outputFiles |
| Input modalities | ImageText | ImageText |
| Output modalities | Text | Text |