GPT-5.5 Instant vs OpenAI: GPT-6 Luna Pro
Both have similar output pricing, while OpenAI: GPT-6 Luna Pro offers a larger context window. Choose GPT-5.5 Instant or OpenAI: GPT-6 Luna Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.5 Instant | OpenAI: GPT-6 Luna Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input / 1M tokens | — | $0.10 |
| Output / 1M tokens | — | $0.50 |
| Context window | — | 1.1M |
| Parameters | — | — |
| Open weights | No | — |
| Released | May 2026 | — |
FAQ
Is GPT-5.5 Instant or OpenAI: GPT-6 Luna Pro cheaper?
GPT-5.5 Instant and OpenAI: GPT-6 Luna Pro have comparable output pricing.
Which has the larger context window, GPT-5.5 Instant or OpenAI: GPT-6 Luna Pro?
OpenAI: GPT-6 Luna Pro has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.