Gemini 3.1 Pro Preview Custom Tools
Gemini 3.1 Pro Preview Custom Tools is Google's language model with a 1.0M context window and up to 66K output tokens, available from 3 providers, starting at $2.00 / 1M input and $12.00 / 1M output. A variant of Gemini 3.1 Pro Preview with improved tool-selection behavior, reducing over-reliance on generic tools in favor of user-defined or third-party functions.
Google's language model with a 1.0M context window and up to 66K output tokens, available from 3 providers, starting at $2.00 / 1M input and $12.00 / 1M output. A variant of Gemini 3.1 Pro Preview with improved tool-selection behavior, reducing over-reliance on generic tools in favor of user-defined or third-party functions.Capabilities
Input5/5
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Output1/5
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Capabilities6/13
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Pricing by Provider
| Provider | Standard | Batch | |||
|---|---|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | Input $ / 1M | Output $ / 1M | |
Google Gemini | $2.00 | $12.00 | $0.200 | $1.00 | $6.00 |
 Google Vertex AI | $2.00 | $12.00 | $0.200 | $1.00 | $6.00 |
 OpenRouter | $2.00 | $12.00 | $0.200 | — | — |
Cost Calculator
Preset:
Compares every provider & tier in USD
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| Gemini 3.1 Pro Preview Custom Tools | 1.0M | $2.00 | $12.00 | Current | |
| Gemini 3.1 Pro Preview | 1.0M | $2.00 | $12.00 | Available | |
| Gemini 3.1 Pro | — | — | $2.20 | $13.20 | Available |
| Gemini 3 Pro Preview | 1.0M | $2.00 | $12.00 | Deprecated | |
| Nano Banana Pro (Gemini 3 Pro Image) | 66K | $2.00 | $12.00 | Available | |
| Gemini 3 Pro | — | — | $2.00 | $12.00 | Available |
| Gemini 2.5 Pro | 1.0M | $1.25 | $10.00 | Available | |
| Gemini 2.5 Pro Preview | 1.0M | $1.25 | $10.00 | Available | |
| Gemini 2.5 Pro Preview TTS | — | 1.0M | $1.00 | $10.00 | Available |
| Gemini 2.5 Pro Preview TTS | — | 1.0M | $1.00 | $10.00 | Available |
| Gemini 2.5 Pro TTS | — | — | $1.00 | $0.000 | Available |
Other models
| Model | Tier | Released | Context | Input / 1M | Output / 1M |
|---|---|---|---|---|---|
| Gemini 3.1 Flash Lite Preview | Flash-lite | 1.0M | $0.250 | $1.50 | |
| Gemini 3.1 Flash Live Preview | Flash | — | 131K | $0.750 | $4.50 |
| Gemini 3.1 Flash TTS Preview | Flash | — | 8K | $1.00 | $0.000 |
| Gemini 3 Flash | Flash | 1.0M | $0.500 | $3.00 | |
| Gemini 3 Flash Preview | Flash | 1.0M | $0.500 | $3.00 | |
| Gemini 3 Deep Think | — | — | — | — | — |
| Gemini 2.5 Flash Lite Preview | Flash-lite | 1.0M | $0.100 | $0.400 | |
| Gemini 2.5 Flash Lite | Flash-lite | 1.0M | $0.075 | $0.300 | |
| Gemini 2.5 Flash | Flash | 1.0M | $0.150 | $0.600 | |
| Gemini 2.5 Computer Use Preview | — | — | 128K | $1.25 | $10.00 |