Nano Banana Flash - Ekly API

Gemini 3.1 Flash with Pro-level image quality at Flash-tier speed and pricing


Model id	`gemini-3.1-flash-image`
Media	image
Submit to	`POST /v1/images`
Price	3 credits credits before discounts
Typical time	about 25.0 s

Request

Required: prompt
Optional: aspect_ratio, reference_images

{
  "model": "gemini-3.1-flash-image",
  "prompt": "Three-quarter character sheet of an Indian uncle in a cream kurta, clean forehead, soft studio key, seamless warm grey backdrop, photoreal, 50mm. No text.",
  "aspect_ratio": "1:1"
}

Field	Allowed	Default
`aspect_ratio`	`1:1`, `3:2`, `2:3`, `4:3`, `3:4`, `5:4`, `4:5`, `16:9`, `9:16`, `21:9`	`"1:1"`
`reference_images`	asset ids (up to 3)

Reference inputs take asset ids from POST /v1/uploads or an earlier output’s asset_id. Prices and allowed values come from the live catalog; GET /v1/models/gemini-3.1-flash-image is always current.