Google: Gemini 3.1 Pro Preview

google/gemini-3.1-pro-preview

Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...

Context window: 1,048,576 tokens
Input: audio · file · image · text · video
Output: text
Relay support: Text & vision

Open in workspace →OpenRouter model page

Reference prices & points

Our global markup: 15% · 1 USD = 10,000 points · Price version 0

Billing unit	OpenRouter / USD	Our reference / USD	Points
Input / 1M tokens	$2	$2.3	23,000
Output / 1M tokens	$12	$13.8	138,000
Per image	$0.000002	$0.0000023	0.023
Audio / 1M tokens	$2	$2.3	23,000
Audio cache / 1M tokens	$0.2	$0.23	2,300
Per search	$0.014	$0.0161	161
Reasoning / 1M tokens	$12	$13.8	138,000
Cache read / 1M tokens	$0.2	$0.23	2,300
Cache write / 1M tokens	$0.375	$0.43125	4,312.5

Actual charge = the OpenRouter request cost × the markup locked for that request. Catalogue rates may be routing references; caching, long context, images and audio are charged when used. Listed prices do not mean every capability is available through this relay.

Catalogue time: 2026-11-11T23:10:25.766Z · Live catalogue

View upstream pricing tiers

These are raw upstream pricing conditions without our markup. The final charge is multiplied by the site rate.

[
  {
    "min_prompt_tokens": 200000,
    "prompt": "0.000004",
    "completion": "0.000018",
    "audio": "0.000004",
    "input_audio_cache": "0.0000004",
    "input_cache_read": "0.0000004"
  }
]

View all upstream price fields

{
  "prompt": "0.000002",
  "completion": "0.000012",
  "image": "0.000002",
  "audio": "0.000002",
  "input_audio_cache": "0.0000002",
  "web_search": "0.014",
  "internal_reasoning": "0.000012",
  "input_cache_read": "0.0000002",
  "input_cache_write": "0.000000375",
  "overrides": [
    {
      "min_prompt_tokens": 200000,
      "prompt": "0.000004",
      "completion": "0.000018",
      "audio": "0.000004",
      "input_audio_cache": "0.0000004",
      "input_cache_read": "0.0000004"
    }
  ]
}

Integration & availability

Use /v1/chat/completions for non-streaming, multi-turn conversations. Models marked for vision accept images; documents can be extracted to text in the workspace. Create a site API key and ensure you have enough points and the service is enabled. Provider availability, context and budget limits apply.

Read the API guide → · Back to model directory