Gemini 3.1 Flash Image Preview

googlegoogle/gemini-3.1-flash-image-preview

Google's latest image generation model with text and image input/output. Supports up to 14 input images combined into 1 output image, with conversational multi-turn editing capabilities.

Context Length

131K

Max Output

33K

Input Price

$0.600/ 1M tokens

Output Price

$72.00/ 1M tokens

Modalities

textimage→textimage

Pricing Breakdown

Type	Rate
Input	$0.600 / 1M tokens
Output	$72.00 / 1M tokens

Image output tokens are $60/MTok. 1K image = ~1,120 tokens = ~$0.067/image.

Supported Parameters

temperaturemax_tokenstop_presponse_formatstop

API Usage Examples

cURL

curl https://api.therouter.ai/v1/images/generations   -H "Content-Type: application/json"   -H "Authorization: Bearer $THE_ROUTER_API_KEY"   -d '{
    "model": "google/gemini-3.1-flash-image-preview",
    "prompt": "A cinematic product render with soft studio lighting"
  }'