Google: Gemini 3.1 Pro Preview Custom Tools
google/gemini-3.1-pro-preview-customtools
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...
Modalities
In / Out Price
$2 / $12 per 1M
Context
1M
Released
Feb 25, 2026
Knowledge Cutoff
—
Pricing
What Reroute charges per unit. No markup on inference — you pay the carrier's price, metered from the carrier's own usage numbers.
Input tokens
$2 / M
Output tokens
$12 / M
Cache read
$0.20 / M
Cache write
$0.375 / M
Reasoning tokens
$12 / M
Image input
$0.000002
Web search
$14 / K requests
Long-context pricing
Prompts over 200K tokens: $4 input / $18 output per M.
By provider
Each carrier sets its own price. The router weighs these against uptime when it picks one.
| Provider | Input /M | Output /M | Cache read /M | Cache write /M | Discount |
|---|---|---|---|---|---|
 Google AI Studio | $2 | $12 | $0.20 | $0.375 | — |