Nano Banana API
Nano Banana is Google's original Gemini 2.5 Flash Image route on OmniaKey, supporting text-to-image generation and reference-based edits through the media API.
- Model ID
- gemini-2.5-flash-image
- Provider
- Modality
- AI Image
- Per successful call
- $0.049
- Last verified
- 2026-09-17
01
Where it fits
Use Nano Banana for existing Gemini 2.5 image workflows and its familiar output; choose Nano Banana 2 for the newer generation at the same OmniaKey price.
02
What it does
Text to image
gemini-2.5-flash-image
Turn a text prompt into a new image.
Image edit
gemini-2.5-flash-image
Change an existing image from a prompt and reference input.
03
Call it
Media models run asynchronously. Create a task, poll it until it finishes, then download the signed asset URL.
# 1. Create the job. 202 Accepted; the body carries the task id,
# the pre-charged price, and a poll_url. Reuse one Idempotency-Key
# across retries so a timeout never starts a second paid job.
curl --fail-with-body https://api.omniakey.com/v1/media/tasks \
-H "Authorization: Bearer $OMNIAKEY_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: gemini-2.5-flash-image-001" \
-d '{
"model": "gemini-2.5-flash-image",
"type": "image",
"operation": "generate",
"input": {"prompt": "a paper boat on a quiet lake at sunset"},
"parameters": {"aspect_ratio": "1:1"}
}'
# 2. Poll GET /v1/media/tasks/{id} until status is
# succeeded | failed | canceled. Progress carries percent and stage.
curl --fail-with-body https://api.omniakey.com/v1/media/tasks/TASK_ID \
-H "Authorization: Bearer $OMNIAKEY_API_KEY"
# 3. Download assets[0].url before expires_at, or poll again for a
# fresh signed URL. Failed and canceled jobs are refunded.
curl -sS -o out.png "$(jq -r '.assets[0].url' result.json)"04
Pricing
Image jobs are billed per successful call, not per token. Failed or canceled jobs are refunded automatically.
$0.049per call
More Google image models
Frequently asked questions
How do I call Nano Banana on OmniaKey?
POST to /v1/media/tasks with the model id, type "image", and operation "generate" or "edit". Reuse one Idempotency-Key across retries so a timeout never starts a second paid job.
What does Nano Banana cost?
Nano Banana bills $0.049 per call. Creation pre-charges that amount from your prepaid balance, and failed or canceled jobs are refunded automatically.
Why does the API return a task id instead of the image?
Provider latency runs from seconds to about a minute, so OmniaKey normalizes every image route into one asynchronous lifecycle. Poll GET /v1/media/tasks/{id} until the status is succeeded, then read the signed asset URL.