Cheap Nano Banana API: Compare Nano Banana 2, 2.1 and Pro Prices

Nano Banana API pricing: 1K, 2K and 4K

The model with the biggest discount is not necessarily the cheapest at every resolution. Nano Banana 2 is lowest at 1K, while Pro is slightly lower at 2K in the current snapshot. Compare the exact model and resolution you intend to buy.

Google's pricing documentation bills image output by tokens and publishes equivalent image estimates. For 2.1, 3,780 output tokens at $30 per million give $0.1134 for 4K, displayed rounded to $0.113 by Google. APIMaster's market reference uses $0.1134. The saving is about 52% with either display rounding; the table does not promise identical total bills or feature support.

Direct Google input tokens, reference images, text/thinking output and search grounding can add charges. The APIMaster rows are the lowest displayed per-image route prices, not a guarantee that every route or account has the same price. Nano Banana 2 also has a 0.5K route quote from $0.009; that is a smaller output tier, not a 1K offer.

How much do 1,000 Nano Banana images cost?

Multiply the exact unrounded route price by the number of images. At the checked lowest quotes, these are image-budget calculations before retries or additional charges:

Model	1,000 × 1K	1,000 × 2K	1,000 × 4K
Nano Banana 2	$13.40	$20.20	$30.20
Nano Banana 2.1	About $16.01	About $24.02	About $54.04
Nano Banana Pro	$20.10	$20.10	$36.00

For example, 1,000 Pro 2K outputs have a Google output-only estimate of $134 versus $20.10 at the lowest APIMaster quote: $113.90 difference, before other charges. This is arithmetic, not a measured generation run.

Which cheap Nano Banana model should you choose?

Start with Nano Banana 2 for a low-cost 1K pipeline. Compare 2.1 when character consistency, text rendering and repeated edits matter to your acceptance test. Google's documentation positions it as an update to Nano Banana 2; that does not prove every prompt produces a better image. Include Pro in a 2K test because its current route price is lower than the other two at that resolution.

Use one repeatable product-image task: the same package, exact label, background and aspect ratio. Check lettering, reference fidelity and the number of acceptable outputs. Cost per accepted image matters more than cost per attempt. For model details, see the Nano Banana 2.1 guide; for another image family, compare GPT Image prices.

How to get a cheap Nano Banana API key

1. Open the model card above and check the selected route's resolution and editing support.
2. Register on APIMaster and fund your API wallet.
3. Create an API key and store it in APIMASTER_API_KEY.
4. Send one representative request before increasing volume.

This example uses Nano Banana 2.1, explicitly requests 1K and follows its Images API contract:

curl --fail-with-body --max-time 300 "https://apimaster.ai/v1/images/generations" \
  -H "Authorization: Bearer $APIMASTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-nano-banana-2.1",
    "prompt": "A lavender ceramic teapot beside two green pears, white background",
    "size": "1:1",
    "resolution": "1K",
    "n": 1
  }'

For this model, size sets aspect ratio and resolution sets the output/billing tier. Use /images/edits with an actual uploaded reference file for editing. Do not assume the same optional parameters work on every Nano Banana route; consult the API guide.

FAQ

What is the cheapest Nano Banana API here?

At the 2026-11-03 check, Nano Banana 2 starts at $0.0134 per 1K image or $0.009 for the separate 0.5K tier. Pro starts at $0.0201 for 2K. Check the live card for your configuration.

Is Nano Banana Pro cheaper than Nano Banana 2.1?

At 2K and 4K, its lowest displayed route is cheaper in this snapshot. At 1K, 2.1 is cheaper. These are distinct models, so compare quality as well as price.

Does a Google AI subscription include this API key?

No. Consumer subscriptions and metered API wallets have separate billing. APIMaster API access uses an APIMaster key and balance.

Does 85% off apply to every Nano Banana model?

No. It applies to Pro's current lowest per-image quote versus Google's published output estimate. Nano Banana 2 is 80% lower; 2.1 is about 52% lower.

Can I edit a reference image?

The 2.1 integration supports reference-image editing. Upload the real image and confirm the chosen route's capabilities. A prompt mentioning a reference does not attach a file.

How do I start without buying a monthly image plan?

Register, create your API key, set the base URL to https://apimaster.ai/v1, and use the exact model ID, such as gemini-nano-banana-2.1. Check the model card and start with one image.