Providers / Google / Gemini 3.1 Pro
Gemini 3.1 Pro API Cost Calculator
Gemini 3.1 Pro costs $2 per 1M input tokens and $12 per 1M output tokens at official Google API prices, verified 2026-10-24. Estimate your own usage below — the calculator is preset to this model.
Paste text to count tokens instead
Cost per call
—
Estimated monthly cost
—
Prices shown apply to prompts up to 200K tokens; longer prompts are billed at a higher tier on this model.
Gemini 3.1 Pro price facts
| Input | $2 per 1M tokens |
|---|---|
| Output | $12 per 1M tokens |
| Cached input | Not published per 1M tokens |
| Batch tier | Not published |
| Context window | Not published |
| Released | — |
| Price verified | 2026-10-24 · source |
What Gemini 3.1 Pro costs in practice
| Workload | Per call | Per month |
|---|---|---|
| Chat assistant 2,000 input / 500 output tokens per call, 10,000 calls a month | $0.01 | $100.00 |
| Document processing 50,000 input / 2,000 output tokens per call, 1,000 calls a month | $0.124 | $124.00 |
| Agent loop with prompt caching 10,000 fresh input / 100,000 cached input / 2,000 output tokens per call, 500 calls a month | $0.044 | $22.00 |
Note: this provider has not published a cached-input rate for this model in our sources, so the caching workload above bills cached tokens at $0 in the breakdown — check the provider before budgeting a caching-heavy workload.
Frequently asked questions
How much does Gemini 3.1 Pro cost per month?
It depends entirely on token volume. As worked examples: a chat assistant doing 10,000 calls a month costs $100.00, while a document pipeline doing 1,000 long calls costs $124.00. Use the calculator above with your own numbers for an exact figure.
Is Gemini 3.1 Pro cheaper than Gemini 3.1 Flash-Lite?
At a blended workload of 1M input and 250K output tokens, Gemini 3.1 Pro costs $5.00 and Gemini 3.1 Flash-Lite costs $0.625 — so Gemini 3.1 Flash-Lite is cheaper at this mix. The answer can flip if your workload is mostly output or mostly cached input, which is exactly what the calculator is for.
Does Gemini 3.1 Pro have batch or caching discounts?
No published batch rate in our sources. No published cached-input rate in our sources.Prices verified 2026-10-24.