Nano Banana 2.1 API
Nano Banana 2.1 is Google's successor to Nano Banana 2 on OmniaKey, covering text-to-image generation and reference-based edits at half the official per-image rate.
- Model ID
- gemini-nano-banana-2.1
- Provider
- Modality
- AI Image
- Per successful call
- $0.0168
- Last verified
- 2026-10-07
Playground
Use this model with your OmniaKey account.
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01
Where it fits
Make Nano Banana 2.1 the default Gemini image route: it costs less per call than Nano Banana 2, and step up to Nano Banana Pro only when an edit needs stronger reasoning.
02
What it does
Text to image
gemini-nano-banana-2.1
Turn a text prompt into a new image.
Image edit
gemini-nano-banana-2.1
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-nano-banana-2.1-001" \
-d '{
"model": "gemini-nano-banana-2.1",
"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.
$0.0168per call
More Google image models
Frequently asked questions
How do I call Nano Banana 2.1 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 2.1 cost?
Nano Banana 2.1 bills $0.0168 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.