Gemini 3.1 Pro (Preview Custom Tools)

google/gemini-3.1-pro-preview-customtools

Gemini 3.1 Pro preview variant tuned for better tool selection behavior in coding agents and multi-tool workflows. It reduces overuse of generic bash tools and improves function-calling reliability while retaining Gemini 3.1 Pro's multimodal reasoning and 1M-token context. NOTE: Inputs > 200k tokens are charged at 2x input and 1.5x output rates.

Vision
Reasoning
Audio input
Video input
Tool calling
Structured output

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Pricing

Includes our margin. Charged per request from your balance.

Input: $2.2 per 1M tokens
Output: $13.2 per 1M tokens
Cache read: $0.22 per 1M tokens
Cache write: $0.412 per 1M tokens
Typical message: $0.052

Details

Provider: Google
Context: 1M tokens
Max output: 66K tokens
Added: Feb 27, 2026
Reasoning effort: low, medium, high

Use it from the API

Replace $HIDE_API_KEY with a key from the Developers page. Base URL https://hide.st/api/v1.

curl https://hide.st/api/v1/chat/completions \
  -H "Authorization: Bearer $HIDE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/gemini-3.1-pro-preview-customtools",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

Pricing

Details

Use it from the API

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