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A side-by-side comparison of GPT-5.6 Luna and GPT-6.1 Terra, using the lowest price and highest limits found across every provider that offers each model.
| GPT-5.6 Luna | GPT-6.1 Terra | |
|---|---|---|
| Providers | 57 | 40 |
| Cheapest input ($/M) | $0.036 via UnoRouter | $0.2 via NaraRouter |
| Cheapest output ($/M) | $0.216 via UnoRouter | $1.0002 via NaraRouter |
| Max context | 1.1M | 1.1M |
| Max output | 128K | 128K |
| Released | Jun 23, 2026 | Sep 27, 2026 |
| Open weights | No | Yes |
| Features | ReasoningToolsStructured outputFiles | ReasoningToolsStructured outputFiles |
| Input modalities | FileImageText | ImageText |
| Output modalities | Text | Text |