Nano Banana Pro vs Nano Banana 2: Price, Limits and Code

Prices on this page are read from our billing table on every request (October 19, 2026). They are the prices your API key is charged, not estimates.

Google's Nano Banana line now has four image models you can call through one API: Nano Banana Pro, Nano Banana 2, Nano Banana 2.1 and Nano Banana 2 Lite. All of them bill per image, and the price depends on the output resolution you ask for, so the useful question is not "which is cheapest" but "which is cheapest at the size I need". Below is the price of one image at 1K, 2K and 4K, the request limits that differ between the models, and working request bodies.

Price per image by resolution

A dash means that size is not sold for that model. Resolution is part of the model id: you call the 4K id to get a 4K image, and a request whose resolution does not match the id is rejected with variant_mismatch before anything is charged. Nano Banana Pro sells 1K and 2K as one id at one price, so with Pro there is no reason to ask for 1K.

The older single-size models are still on sale: Nano Banana (first version), text to image $0.028, Nano Banana Edit, image to image $0.028 per image. They take no resolution field.

The short answer

• Cheapest image: Nano Banana 2 Lite at 1K, $0.028. A $10 top-up covers 357 of them.
• Cheapest at 2K: Nano Banana 2.1, $0.042 per image.
• Cheapest at 4K: Nano Banana 2.1, $0.063 per image.
• Pro vs 2 at 4K: $0.168 vs $0.126, Pro costs 1.33x as much.
• 2.1 vs 2: Nano Banana 2.1 is the cheaper of the two at every size we sell (1K $0.028 vs $0.056, 2K $0.042 vs $0.084, 4K $0.063 vs $0.126).

Nano Banana Pro vs Nano Banana 2: what the request accepts

Price is one half of the choice. The other half is what each model lets you send. These limits come from the model specifications and apply to the input object of your request.

In practice: Nano Banana 2 and 2.1 take more reference images (10 against 8) and the tall and wide banner shapes Pro does not offer. Pro defaults to a square 1:1 frame when you leave aspect_ratio out, Nano Banana 2 and 2.1 default to auto. Nano Banana 2 Lite renders at 1K only, needs aspect_ratio in every request and names its reference field image_urls. Prompts can be up to 20,000 characters on all four.

Which one looks better for your prompts is a test, not a table. Run the same prompt through Pro and Nano Banana 2 in the playground before you commit to one, and read the Nano Banana prompt guide for prompt patterns that hold up on both.

Against Flux 2 Pro and GPT Image 2

The two models people usually price next to Nano Banana, at the same output sizes:

Flux 2 Pro is sold at 1K and 2K only. GPT Image 2 is sold at all three sizes.

Code: switching models is one field

Same key and endpoint for every model. Change model and the matching resolution; the response is a taskId you poll, or pass callBackUrl to have the result sent to you.

# Nano Banana Pro, 2K: $0.126 per image
curl https://aimarcusimage.eu/api/v1/jobs/createTask \
  -H "Authorization: Bearer sk-aig-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google-google-nano-banana-pro-1-2k",
    "input": {
      "prompt": "A ceramic coffee cup on a walnut desk, morning window light, product photo",
      "aspect_ratio": "4:3",
      "resolution": "2K",
      "output_format": "png"
    }
  }'

# Nano Banana 2.1, 4K: $0.063 per image
curl https://aimarcusimage.eu/api/v1/jobs/createTask \
  -H "Authorization: Bearer sk-aig-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google-nano-banana-2-1-4k",
    "input": {
      "prompt": "A ceramic coffee cup on a walnut desk, morning window light, product photo",
      "aspect_ratio": "16:9",
      "resolution": "4K"
    }
  }'

# Nano Banana 2, 1K, one reference image: $0.056 per image
curl https://aimarcusimage.eu/api/v1/jobs/createTask \
  -H "Authorization: Bearer sk-aig-..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google-google-nano-banana-2-1k",
    "input": {
      "prompt": "Same cup, now on a marble counter",
      "image_input": [
        "https://example.com/your-cup.png"
      ],
      "aspect_ratio": "1:1",
      "resolution": "1K"
    }
  }'

# Poll until state is "success", then read the image URL from resultJson
curl "https://aimarcusimage.eu/api/v1/jobs/recordInfo?taskId=YOUR_TASK_ID" \
  -H "Authorization: Bearer sk-aig-..."

Field reference and error codes are in the API docs.

How you pay

Credits, no subscription. The $10 Starter top-up gives 1,430 credits, so 1 credit is $0.0070; larger packs give more credits per dollar ($10 = 1,430, $50 = 7,500, $200 = 32,000). Credits do not expire. Every Nano Banana variant with its price is on Nano Banana API pricing, and the Nano Banana API overview has the full model list.

FAQ

How much does the Nano Banana Pro API cost?

$0.126 per image at 1K or 2K and $0.168 at 4K. You pay per image generated, with no subscription.

How much does the Nano Banana 2 API cost per image?

$0.056 at 1K, $0.084 at 2K, $0.126 at 4K. Nano Banana 2.1 costs $0.028 at 1K, $0.042 at 2K, $0.063 at 4K.

Which Nano Banana model is the cheapest?

Nano Banana 2 Lite at 1K, $0.028 per image. At 4K the cheapest is Nano Banana 2.1 at $0.063.

What is the difference between Nano Banana Pro and Nano Banana 2 in the API?

Price and request limits. Pro accepts up to 8 reference images and 11 aspect ratio options; Nano Banana 2 accepts up to 10 and 15, including 1:4, 4:1, 1:8 and 8:1. Both render 1K, 2K and 4K.

Do I need a subscription?

No. You top up from $10 (1,430 credits) and each image is deducted at the price shown. Credits do not expire.