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Gemini 3.1 Pro

by Google · Released 2026

The reasoning-heavy Gemini tier, with a long-context pricing tier above 200K tokens. Model id gemini-3.1-pro-preview.

Google — gemini-3.1-pro-preview logo
LLM Chat

Gemini 3.1 Pro

Powered by Google · Proprietary multimodal transformer

Context Window

1M tokens

Parameters

Undisclosed

Max Output

65,536 tokens

Category

LLM Chat

Overview

Gemini 3.1 Pro is Google's reasoning-focused Gemini tier. It carries the same 1,048,576-token context as the Flash line but is tuned for harder multi-step problems, and it is the only Gemini model CallMissed sells that has a distinct long-context price band.

Call model gemini-3.1-pro-preview on /v1/chat/completions. Thinking defaults to high; low, medium and high are accepted, and minimal is down-mapped to low.

Long-context billing: prompts above 200,000 input tokens bill at $4.00 in / $18.00 out per 1M for the whole request. Below that threshold the standard $2.00 / $12.00 applies.

Pricing

MetricPrice
Input /1M tokens₹200.0000
Output /1M tokens₹1200.0000

1 credit = ₹1 = $0.01 USD. Transparent per-call pricing — you pay only for what you call, with no seat fees or minimums.

Key Highlights

  • 1,048,576-token context window
  • Multimodal input: text, image, video, audio, PDF
  • Function calling and structured outputs
  • Thinking levels: low, medium, high

Technical Details

  • Model id: gemini-3.1-pro-preview
  • Context window: 1,048,576 input / 65,536 output tokens
  • Thinking levels accepted: low, medium, high
  • Output pricing is inclusive of thinking tokens

Strengths

  • 1M-token context at a competitive rate
  • Native multimodal input without a separate vision model

Limitations

  • Paid plans only
  • Thinking tokens bill as output

Use Cases

Long-document analysisMultimodal understandingAgentic tool useHigh-volume extraction

API Example

curl https://api.callmissed.com/v1/chat/completions \
  -H "Authorization: Bearer cm_YOUR_KEY" \
  -d '{"model": "gemini-3.1-pro-preview", "messages": [{"role": "user", "content": "Summarise this contract."}]}'

Endpoint: POST /v1/chat/completions · Model ID: gemini-3.1-pro-preview

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