Model comparison · updated 2026-07-28
Side-by-side pricing for1 million tokens
| Gemini 3.1 Pro | GPT-5.6 Luna | Verdict | |
|---|---|---|---|
| Provider | OpenAI | -- | |
| Context window | 1M | 1.05M | -- |
| Input / 1M tokens | $2 | $1 | GPT-5.6 Luna is 2x cheaper |
| Output / 1M tokens | $12 | $6 | GPT-5.6 Luna is 2x cheaper |
| Output:input ratio | 6x | 6x | -- |
| Tier | balanced | budget | -- |
Gemini 3.1 Pro: Prices double for prompts above 200K tokens ($4 / $18).
Gemini 3.1 Pro
5,000,000 tokens
GPT-5.6 Luna
10,000,000 tokens
GPT-5.6 Luna gives you 2x more input for the same budget.
Gemini 3.1 Pro
833,333 tokens
GPT-5.6 Luna
1,666,667 tokens
GPT-5.6 Luna gives you 2x more output for the same budget.