Gemini 3.1 Pro Preview
Google
google/gemini-3.1-pro-preview
Reasoning model, 1M context
Context Window
1.0M
1,000,000 tokens
Max Output
66K
65,536 tokens
About this model
Gemini 3.1 Pro Preview β newest flagship via Vertex
This model supports up to 1M tokens of context. It includes native vision understanding for analyzing images and documents. It excels at complex reasoning, mathematical problems, and multi-step tasks. It provides strong code generation and debugging capabilities.
Access it through Chuizi.AI with a single ck- API key β no separate Google account needed.
Highlights
1M context window
66K max output
Advanced reasoning
Native vision support
Strong code generation
Best For
Complex coding tasksAlgorithm designCode reviewTechnical architecture
2026-02-01
Capabilities
ChatVisionReasoningCodepdftoolscache
Aliases
gemini-3.1-pro-previewPricing (per 1M tokens)
| Pricing (per 1M tokens) | / 1M tokens |
|---|---|
| Input / 1M | $2.10 |
| Output / 1M | $12.60 |
| Cache Read | $0.21 |
Final prices shown
Quick Start
main.py
from openai import OpenAI client = OpenAI( base_url="https://api.chuizi.ai/v1", api_key="ck-your-key-here", ) response = client.chat.completions.create( model="google/gemini-3.1-pro-preview", messages=[{"role": "user", "content": "Hello!"}], ) print(response.choices[0].message.content)