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Gemini 3.1 Pro Preview Custom Tools

GoogleFirst listed Feb 2026
VisionTool useReasoningAudioPrompt cachingStructured outputWeb search
Compare Gemini 3.1 Pro Preview Custom ToolsCount tokens for Gemini 3.1 Pro Preview Custom Tools
Context
1M
Max output
66K
Serving providers
5
Cheapest input
$2.00 /1M
On-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.

Pricing by serving provider

standard tier · per 1M tokens · click a provider to expand
Serving providerInput /1MOutput /1MEndpoints
Aihubmix$2.00$12.001
GoogleCheapest$2.00$12.001
Standardgemini/gemini-3.1-pro-preview-customtools
ComponentUnitStandardBatch
Text cached in/1M tok$0.20—
Text input/1M tok$2.00$1.00
Text output/1M tok$12.00$6.00
OpenRouter$2.00$12.001
Vertex AI$2.00$12.001
Vertex AI Language Models$2.00$12.001

Price history

listed seller prices, input and output per 1M tokens
Input Output
$0.00$5.00$10.00$15.00Feb 19Jun 22Sep 16$12.00$2.00

Cost calculator

estimate your monthly spend on this model
$1,360
estimated / month

Model IDs

copy the exact identifier for your platform
gemini/gemini-3.1-pro-preview-customtoolsgemini-3.1-pro-preview-customtoolsvertex_ai/gemini-3.1-pro-preview-customtoolsgoogle/gemini-3.1-pro-preview-customtoolsaihubmix/gemini-3.1-pro-preview-customtools

Frequently asked questions

Gemini 3.1 Pro Preview Custom Tools pricing, context and availability

How much does Gemini 3.1 Pro Preview Custom Tools cost?

Gemini 3.1 Pro Preview Custom Tools costs $2.00 per 1M input tokens from Google, and $12.00 per 1M output tokens from Google.

What is the context window of Gemini 3.1 Pro Preview Custom Tools?

Gemini 3.1 Pro Preview Custom Tools accepts up to 1M tokens of context and can return up to 66K output tokens.

Which providers serve Gemini 3.1 Pro Preview Custom Tools?

Gemini 3.1 Pro Preview Custom Tools is available from 5 serving providers, each with its own pricing and model ID. Google is currently the cheapest.

What can Gemini 3.1 Pro Preview Custom Tools do?

Gemini 3.1 Pro Preview Custom Tools supports image input (vision), tool use, reasoning, audio input, prompt caching, structured output and web search.

Other Google models

compare pricing across the Google lineup
Gemma 4 31B$0.09/1M · 13 providersGemma 4 26B A4B $0.07/1M · 10 providersGemma 3 27B$0.08/1M · 8 providersGemini 2.5 Flash$0.15/1M · 8 providersGemini 3.7 Flash$0.75/1M · 7 providersGemini 2.5 Pro$1.25/1M · 7 providersGemini 3.5 Flash$1.50/1M · 7 providersGemini 3.1 Flash Lite$0.25/1M · 6 providers
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026

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