Imagefrom$0.0336 / image

Nano Banana 2.1

Generates and edits images · up to 4K · up to 4 per request

text-to-imageimage-edit

curl -X POST https://api.open.sume.com/v1/image-router/generate \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"nano-banana-2.1","prompt":"A studio product photo on a white sweep","aspect_ratio":"1:1","resolution":"0.5K","num_images":1}'

1. Calling the API

Nano Banana 2.1 has the model id nano-banana-2.1. Send a JSON body to POST https://api.open.sume.com/v1/image-router/generate.

Parameter	Type	Required	Default	Description
model	string	Yes	—	"nano-banana-2.1"
prompt	string	Yes	—	What the image shows.
image_urls	string[]	No	—	Images to edit or follow (HTTPS).
aspect_ratio	string	No	1:1	Frame shape. Options: auto, 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16, 4:1, 1:4, 8:1, 1:8.
resolution	string	No	0.5K	Output resolution. Options: 0.5K, 1K, 2K, 4K.
num_images	integer	No	1	Images per request, 1–4.

2. Authentication

Send your open.sume.com key as a bearer token from server code only. Keys minted on open.sume.com bill this balance in dollars and call the model API only.

Authorization: Bearer $SUME_API_KEY

3. Queue

A submit answers 202 with the job, its status_url and result_url. Poll the status until it is completed, failed or canceled; failed and canceled jobs are refunded.

Pricing

Dollars per unit at each option, from our rate card; a request rounds up to $0.0001. The estimate above is the exact charge.

Option	Price
0.5K	$0.0750 / image
1K	$0.0336 / image
2K	$0.0504 / image
4K	$0.1134 / image

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