Gemini 3 Pro Preview

Google’s Gemini 3 Pro Preview via Gemini API. Advanced reasoning with thinking mode.

Gemini 3 Pro Preview is Google’s advanced language model, available through AnyFast via the native Gemini API. It excels at complex reasoning, coding, writing, and analysis with thinking capabilities.

Key capabilities

• Native Gemini API — Uses Google’s native API format for full feature access
• Thinking mode — Supports thinking configuration for enhanced reasoning
• Multi-turn conversations — Handles complex dialogue with system instructions
• Safety settings — Configurable content safety filters

Quick example

cURL

curl "https://www.anyfast.ai/v1beta/models/gemini-3-pro-preview:generateContent?key=YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [
      {
        "role": "user",
        "parts": [{ "text": "Explain quantum computing in simple terms." }]
      }
    ],
    "generationConfig": {
      "temperature": 1,
      "topP": 1
    }
  }'

Parameters

Parameter	Type	Required	Description
key	string	Yes	API key (query parameter)
contents	array	Yes	Array of { role, parts } objects
systemInstruction	object	No	System instruction with parts array
generationConfig.temperature	float	No	0–2. Controls randomness. Default: 1
generationConfig.topP	float	No	Nucleus sampling threshold. Default: 1
generationConfig.thinkingConfig	object	No	Thinking mode configuration

API Reference

View the interactive API playground for Gemini 3 Pro Preview.