Google: Gemini 3.1 Pro Preview Custom Tools
🇺🇸 Google · Gemini 3.1
Overview
Google: Gemini 3.1 Pro Preview Custom Tools is a large language model API from Google, part of its Gemini 3.1 model family. With $2.00 per million input tokens and $12.00 per million output tokens, it is a premium-tier model where output volume is the main cost to watch. Output tokens cost about 6× as much as input, so prompt-heavy workloads run noticeably cheaper than generation-heavy ones. An exceptionally large 1.05M-token context window (≈1,573 pages of text) means entire repositories or document collections can be processed without chunking. Beyond plain text it also accepts Audio, Image, Video, File input, so it can be applied to multimodal tasks rather than text alone. All prices on this page reflect OpenRouter's routed rates and are re-synced automatically every day; confirm against the provider's official pricing before committing to production.
| Dimension | Unit | Price (USD) |
|---|---|---|
| Input | per 1M tokens | $2.00 |
| Output | per 1M tokens | $12.00 |
| Cached Input | per 1M tokens | $0.200 |
| Cache Write | per 1M tokens | $0.375 |
| Reasoning | per 1M tokens | $12.00 |
| Image Input | per image | $0.0000 |
| Audio Input | per minute | $0.0000 |
| Web Search | per search | $0.014 |
- Provider
- Model Family
- Gemini 3.1
- Version String
- google/gemini-3.1-pro-preview-customtools
- Status
- Active
- Modality
- Text, Audio, Image, Video, File
- Context Window
- 1,048,756 tokens
- Output Limit
- 65,536 tokens
90-Day Price Trend
Input / Output price (USD per 1M tokens)
Past 90 days of records; every price change is shown here
| Date | Dimension | Price (USD) | Source |
|---|---|---|---|
| Web Search | $0.014 | OpenRouter | |
| Audio Input | $0.0000 | OpenRouter | |
| Image Input | $0.0000 | OpenRouter | |
| Reasoning | $12.00 | OpenRouter | |
| Cache Write | $0.375 | OpenRouter | |
| Cached Input | $0.200 | OpenRouter | |
| Output | $12.00 | OpenRouter | |
| Input | $2.00 | OpenRouter | |
| Web Search | $0.014 | OpenRouter | |
| Audio Input | $0.0000 | OpenRouter | |
| Image Input | $0.0000 | OpenRouter | |
| Reasoning | $12.00 | OpenRouter | |
| Cache Write | $0.375 | OpenRouter | |
| Cached Input | $0.200 | OpenRouter | |
| Output | $12.00 | OpenRouter | |
| Input | $2.00 | OpenRouter | |
| Web Search | $0.014 | OpenRouter | |
| Audio Input | $0.0000 | OpenRouter | |
| Image Input | $0.0000 | OpenRouter | |
| Reasoning | $12.00 | OpenRouter | |
| Cache Write | $0.375 | OpenRouter | |
| Cached Input | $0.200 | OpenRouter | |
| Output | $12.00 | OpenRouter | |
| Input | $2.00 | OpenRouter | |
| Web Search | $0.014 | OpenRouter | |
| Audio Input | $0.0000 | OpenRouter | |
| Image Input | $0.0000 | OpenRouter | |
| Reasoning | $12.00 | OpenRouter | |
| Cache Write | $0.375 | OpenRouter | |
| Cached Input | $0.200 | OpenRouter | |
| Output | $12.00 | OpenRouter | |
| Input | $2.00 | OpenRouter | |
| Web Search | $0.014 | OpenRouter | |
| Audio Input | $0.0000 | OpenRouter | |
| Image Input | $0.0000 | OpenRouter | |
| Reasoning | $12.00 | OpenRouter | |
| Cache Write | $0.375 | OpenRouter | |
| Cached Input | $0.200 | OpenRouter | |
| Output | $12.00 | OpenRouter | |
| Input | $2.00 | OpenRouter | |
| Web Search | $0.014 | OpenRouter | |
| Audio Input | $0.0000 | OpenRouter | |
| Image Input | $0.0000 | OpenRouter | |
| Reasoning | $12.00 | OpenRouter | |
| Cache Write | $0.375 | OpenRouter | |
| Cached Input | $0.200 | OpenRouter | |
| Output | $12.00 | OpenRouter | |
| Input | $2.00 | OpenRouter | |
| Web Search | $0.014 | OpenRouter | |
| Audio Input | $0.0000 | OpenRouter |
Key Insights
Key data points from this page for quick reference and citation.
- Google: Gemini 3.1 Pro Preview Custom Tools Input price: $2/M tokens
- Google: Gemini 3.1 Pro Preview Custom Tools Output price: $12/M tokens
- Context window: 1,048,756 tokens
- Provider: Google
- Model family: Gemini 3.1
- Modalities: Text, Audio, Image, Video, File
- Data source: OpenRouter, updated daily