GPT 5.6 Luna
Its mid-range listed input price makes it a balanced daily driver for coding. Vision support fits UI screenshots, browser and visual tasks, while the 1M tokens context window suits large monorepos and long sessions.
Model comparison
GPT 5.6 Luna vs GPT 5.6 Terra
Compare listed prices, context windows and vision support.
Side-by-side comparison
| Spec | GPT 5.6 Luna | GPT 5.6 Terra |
|---|---|---|
| Listed input price | $0.2/M | $2/M |
| Listed output price | $1.2/M | $12/M |
| Context window | 1M tokens | 1M tokens |
| Vision | Yes | Yes |
| Availability | Retired 6 October 2026 | Live |
Good for
GPT 5.6 Terra
Its listed input price places it in the catalog's tier for the hardest reasoning, architecture and review work. Vision support fits UI screenshots, browser and visual tasks, while the 1M tokens context window suits large monorepos and long sessions.
Data summary
GPT 5.6 Luna lists lower input and output prices. Both models have a 1M tokens context window. Both models support vision.
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Catalog updated 2026-10-14