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Gemini 3.1 Pro Preview is Google’s latest advanced language model, available through AnyFast via the native Gemini API. It excels at complex reasoning, coding, writing, and analysis with thinking capabilities.

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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

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Quick example

curl "https://www.anyfast.ai/v1beta/models/gemini-3.1-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
    }
  }'

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Parameters

ParameterTypeRequiredDescription
keystringYesAPI key (query parameter)
contentsarrayYesArray of { role, parts } objects
systemInstructionobjectNoSystem instruction with parts array
generationConfig.temperaturefloatNo0–2. Controls randomness. Default: 1
generationConfig.topPfloatNoNucleus sampling threshold. Default: 1
generationConfig.thinkingConfigobjectNoThinking mode configuration

API Reference

View the interactive API playground for Gemini 3.1 Pro Preview.