RouterLab
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Publisher : GoogleFamily : GeminiAvailableNo subscription

Gemini 3.1 Pro Preview API

Model ID : gemini-3.1-pro-preview

Model ID

gemini-3.1-pro-preview

OpenAI-compatible API

Context window

1,048,576 tokens

Maximum output

65,536 tokens

Input / 1M tokens

4.00 USD

Output / 1M tokens

18.00 USD

Cache read / 1M tokens

$0.40

Cache write / 1M tokens

$0.40

Cache reads reuse stored tokens; cache writes create the provider cache.

Access to this model

Authorized plans : bronze, gold, silver, pro, business

This model is also available with credits without a subscription.

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Published capabilities

  • Vision
  • Tool calling
  • Streaming
  • Structured
  • Reasoning

Minimal request

curl https://api.routerlab.ch/v1/chat/completions \
  -H "Authorization: Bearer $ROUTERLAB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gemini-3.1-pro-preview","max_tokens":128,"messages":[{"role":"user","content":"Hello RouterLab"}]}'