Google: Gemini 3.1 Pro Preview Custom Tools
by GoogleGoogle: Gemini 3.1 Pro Preview Custom Tools is a large language model from Google. It costs $2.00 per million input tokens and $12.00 per million output tokens. Its context window is 1.0M tokens.
- Input / 1M tokens
- $2.00
- Output / 1M tokens
- $12.00
- Cached input / 1M
- $0.200
- Context window
- 1.0M
On repeated prefixes
tokens
This model also charges $0.014 per search request
That is $14.00 per 1,000 requests, billed on top of the token prices above. On a typical 1,000-in / 500-out exchange the tokens cost $0.008, so the search fee is 1.8× the token cost. Per-token rankings elsewhere ignore this entirely.
Who serves it cheapest
1 hosts serve Gemini 3.1 Pro Preview Custom Tools. Same weights, same API - the price difference is pure margin and routing.
| Provider | Input / 1M | Output / 1M | Context | Throughput | Uptime 24h |
|---|---|---|---|---|---|
| Google AI StudioCheapest | $2.00 | $12.00 | 1.0M | - | 99.9% |
About 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...
Specifications
| Model ID | google/gemini-3.1-pro-preview-customtools |
|---|---|
| Provider | |
| Context window | 1.0M tokens |
| Max output | 66K tokens |
| Input modalities | text, audio, image, video, file |
| Output modalities | text |
| Knowledge cutoff | - |
| Open weights | No |
| Released | February 25, 2026 |
Cheaper alternatives
Models that cost less than Gemini 3.1 Pro Preview Custom Tools while keeping at least half its context window and every input modality it supports.
Frequently asked
How much does Google: Gemini 3.1 Pro Preview Custom Tools cost?
$2.00 per million input tokens and $12.00 per million output tokens. Cached input reads cost $0.200 per million tokens.
What is the context window of Google: Gemini 3.1 Pro Preview Custom Tools?
1.0M tokens, with up to 66K tokens of output per request.
Does Google: Gemini 3.1 Pro Preview Custom Tools have extra fees beyond per-token pricing?
Yes. Google: Gemini 3.1 Pro Preview Custom Tools charges $0.014 per search request - $14.00 per 1,000 requests - on top of $2.00 per million input tokens and $12.00 per million output tokens. On a typical 1,000-input / 500-output exchange the search fee alone is 1.8× the token cost.
Confirm against the source: Google official pricing.