Model comparison · updated 2026-07-28
Side-by-side pricing for1 million tokens
| Gemini 3.1 Pro | Gemini 3.5 Flash | Verdict | |
|---|---|---|---|
| Provider | -- | ||
| Context window | 1M | 1M | -- |
| Input / 1M tokens | $2 | $1.50 | Gemini 3.5 Flash is 1.3x cheaper |
| Output / 1M tokens | $12 | $9 | Gemini 3.5 Flash is 1.3x cheaper |
| Output:input ratio | 6x | 6x | -- |
| Tier | balanced | balanced | -- |
Gemini 3.1 Pro: Prices double for prompts above 200K tokens ($4 / $18).
Gemini 3.1 Pro
5,000,000 tokens
Gemini 3.5 Flash
6,666,667 tokens
Gemini 3.5 Flash gives you 1.3x more input for the same budget.
Gemini 3.1 Pro
833,333 tokens
Gemini 3.5 Flash
1,111,111 tokens
Gemini 3.5 Flash gives you 1.3x more output for the same budget.