google
Google: Gemini 3.1 Pro Preview Custom Tools API Pricing
Google: Gemini 3.1 Pro Preview Custom Tools costs $2.00 per 1M input tokens and $12.00 per 1M output tokens (cache reads: $0.200). Context window: 1.0M. Prices verified 2026-08-23 Β· source
Input / 1M tokens
$2.00
Output / 1M tokens
$12.00
Context window
1.0M
Max output
66K
What would Google: Gemini 3.1 Pro Preview Custom Tools cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $64.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $200.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $420.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $104.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About Google: Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party...
Compare Google: Gemini 3.1 Pro Preview Custom Tools with
Official resources
- Google: Gemini 3.1 Pro Preview Custom Tools on OpenRouter β live endpoint, pricing source of record.
- Get an OpenRouter API key β β one key, every model including Tools. Free credits on signup.
- Shred your current bill β paste a CSV and see if switching saves money.