Gemini 3.1 Pro Preview API
gemini-3.1-pro-previewGemini 3.x Pro preview with enhanced reasoning and multimodal capabilities.
API Documentation
View complete API reference with all parameters and examples.
Full API Documentation
View complete API reference with streaming, thinking, and more.
Pricing
Billing: Cost = (input_tokens * input_price + output_tokens * output_price) / 1,000,000
Gemini 3.x Pro
Pro release of the Gemini 3.x generation
Enhanced Reasoning
Improved problem solving
Multimodal
Process any input type
High Quality
Premium outputs
About Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview is a Large Language Model API provided by Google. Gemini 3.x Pro preview with enhanced reasoning and multimodal capabilities. Through APIMODELS platform, you can access this model via a unified API with transparent pay-as-you-go pricing. Current pricing: Input: $0.882, Output: $5.294 per 1M tokens.
Key Features
- Gemini 3.x Pro -- Pro release of the Gemini 3.x generation
- Enhanced Reasoning -- Improved problem solving
- Multimodal -- Process any input type
- High Quality -- Premium outputs
Use Cases
Chatbot & Customer Support
Build intelligent conversational systems to automatically answer user queries and improve service efficiency.
Content Generation
Automatically write articles, emails, ad copy, and other text content to boost productivity.
Code Assistant
Assist with code writing, debugging, and code review to accelerate software development.
Data Analysis
Understand and analyze unstructured data, extract key insights, and generate summary reports.
Why APIMODELS
- Unified API -- One API key to access all models, no need to register on multiple platforms
- Transparent Pricing -- Pay-as-you-go with per-call pricing published on every model page, ideal for indie developers and startups
- Instant Access -- Start using immediately after signup, supports Stripe and Alipay payments
- Full Documentation -- Detailed API docs with code examples in cURL, Python, and Node.js
Frequently Asked Questions
How much does Gemini 3.1 Pro Preview cost?
Gemini 3.1 Pro Preview is available through APIMODELS at: Input: $0.882, Output: $5.294 per 1M tokens. Billing is pay-as-you-go — you only pay for what you generate.
How to use Gemini 3.1 Pro Preview API?
Sign up at APIMODELS, get your API key, and call our unified API endpoint. We provide detailed API documentation with code examples in cURL, Python, and Node.js.
What is the difference between APIMODELS and the official Google API?
APIMODELS offers the same Gemini 3.1 Pro Preview model through our aggregation platform. We provide a unified API interface so you do not need separate accounts for each provider - one API key to access all models.
How does Gemini 3.1 Pro Preview compare to other Large Language Model models?
On APIMODELS, Gemini 3.1 Pro Preview runs alongside 60+ models on one API key and one balance, so choosing is about fit, not lock-in. It supports Gemini 3.x Pro, Enhanced Reasoning, Multimodal, and you can weigh it on price and capability against other Large Language Model models, then switch by changing a single model-name string — no new account or integration. Browse every Large Language Model option with live pricing at apimodels.app/models.
What can Gemini 3.1 Pro Preview do?
Gemini 3.1 Pro Preview supports: Gemini 3.x Pro, Enhanced Reasoning, Multimodal. See the APIMODELS docs for full parameters and call examples.
Can I access the Gemini 3.1 Pro Preview API from anywhere (incl. China)?
Yes. APIMODELS exposes Gemini 3.1 Pro Preview through a single unified API and one key — no separate provider accounts, and no need to handle each provider's regional network access yourself.
What payment methods are supported?
We support Stripe (Visa, Mastercard, and other international cards) and Alipay. Credits are available instantly after payment.