Model comparison · updated 2026-10-02
Side-by-side pricing for1 million tokens
| Gemini 3.1 Pro | Gemini 3.8 Flash | Verdict | |
|---|---|---|---|
| Provider | -- | ||
| Context window | 1M | 1M | -- |
| Input / 1M tokens | $2 | $0.75 | Gemini 3.8 Flash is 2.7x cheaper |
| Output / 1M tokens | $12 | $3.75 | Gemini 3.8 Flash is 3.2x cheaper |
| Output:input ratio | 6x | 5x | -- |
| Tier | flagship | balanced | -- |
Gemini 3.1 Pro: Prices rise to $4 / $18 for prompts above 200K tokens.
Gemini 3.8 Flash: Introductory price through Dec 31, 2026; $1.50 / $7.50 from Jan 1, 2027.
Gemini 3.1 Pro
5,000,000 tokens
Gemini 3.8 Flash
13,333,333 tokens
Gemini 3.8 Flash gives you 2.7x more input for the same budget.
Gemini 3.1 Pro
833,333 tokens
Gemini 3.8 Flash
2,666,667 tokens
Gemini 3.8 Flash gives you 3.2x more output for the same budget.