Nano Banana Pro API Pricing — $0.05/Image, 1K–4K

Pricing

Nano Banana Pro API pricing: cost per image at 1K, 2K and 4K

Per-image prices for 1K, 2K and 4K, compared with Google’s real-time API.

per image	1K	2K	4K
BetterToken	$0.05−63%	$0.07−48%	$0.08−67%
Google real-time APIImage output only	$0.13	$0.13	$0.24

The full cost of one 1K image at Google

1,120 tokens × $120 / 1M = ≈ $0.13

700–900 thinking tokens × $12 / 1M = ≈ $0.01–0.01

100–500 prompt tokens × $2 / 1M ≈ $0–0

≈ $0.14–0.15

Budget example, not a measured bill. One image, no reference image, no retries.

2026-11-03 · Google Gemini API pricing ↗ · Pricing

Estimate your monthly cost

Resolution

Images per month

BetterToken$50per month

Google real-time API$134.40–146.20per month

You save≈ $84.40–96.20per month

Get your API key

Top-up tiers

Credit amount	You pay	1K · images	2K · images	4K · images	Top up
$5→ You pay $3First top-up	$3	1K 100	2K 71	4K 62	Top up
$50→ You pay $48	$48	1K 1,000	2K 714	4K 625	Top up
$100→ You pay $95	$95	1K 2,000	2K 1,428	4K 1,250	Top up
$200→ You pay $185	$185	1K 4,000	2K 2,857	4K 2,500	Top up
$500→ You pay $450	$450	1K 10,000	2K 7,142	4K 6,250	Top up

Discounts apply per top-up; first top-up saves an extra $2.

Start here

Get a Nano Banana Pro API key and make your first image

Nano Banana Pro 1K sample: mechanical watch infographic

Example · nano-banana-pro · 1K · 1024 × 1024

Sign up → get your key → add balance. Sign in · Stripe · USDT (TRC-20)

Code examples

Use the Nano Banana Pro API with OpenAI or Gemini SDKs

Full API reference — parameters, errors, limits ↗

Use OpenAI-compatible or Gemini native SDKs. The image comes back in the response — no task polling.

image_size selects the billing tier; aspect_ratio selects the shape. size does not guarantee exact returned pixels.

Read API key from BETTERTOKEN_API_KEY. Keep it out of shared code.

curl --fail-with-body --max-time 600 \
  'https://bettertoken.ai/v1/images/generations' \
  -H "Authorization: Bearer $BETTERTOKEN_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "nano-banana-pro",
    "prompt": "A mechanical wristwatch e-commerce infographic with labeled callouts",
    "n": 1,
    "image_size": "1K",
    "aspect_ratio": "1:1",
    "response_format": "b64_json"
  }' -o response.json

Save the returned image

import json, base64
raw = base64.b64decode(json.load(open("response.json"))["data"][0]["b64_json"])
ext = "png" if raw[0] == 137 else "jpg" if raw[0] == 255 else "webp"
open("image." + ext, "wb").write(raw)

Two protocols. One direct response.

Protocol	Text to image	Reference image editing	Inpainting (mask)
OpenAI Images`/v1/images/generations /v1/images/edits`	✓	✓	—
Gemini native`/v1beta/models/nano-banana-pro:generateContent`	✓	✓	✓Handled by BetterToken gateway

API docs ↗

Resolution

Nano Banana Pro resolution: 1K, 2K and 4K, tested

Measured on 2026-11-04: all nine 1K/2K/4K and aspect-ratio combinations met their target dimensions. 4K returned 4096 × 4096 (1:1), 5504 × 3072 (16:9) and 3072 × 5504 (9:16).

Resolution · Ratio	Expected pixels	Measured	Meets target	Elapsed
1K
1K · 1:1	1,024 × 1,024	1,024 × 1,024	✓	95 s	✓ · 95 s
1K · 16:9	1,376 × 768	1,376 × 768	✓	125 s	✓ · 125 s
1K · 9:16	768 × 1,376	768 × 1,376	✓	146 s	✓ · 146 s
2K
2K · 1:1	2,048 × 2,048	2,048 × 2,048	✓	167 s	✓ · 167 s
2K · 16:9	2,752 × 1,536	2,752 × 1,536	✓	160 s	✓ · 160 s
2K · 9:16	1,536 × 2,752	1,536 × 2,752	✓	147 s	✓ · 147 s
4K
4K · 1:1	4,096 × 4,096	4,096 × 4,096	✓	123 s	✓ · 123 s
4K · 16:9	5,504 × 3,072	5,504 × 3,072	✓	154 s	✓ · 154 s
4K · 9:16	3,072 × 5,504	3,072 × 5,504	✓	141 s	✓ · 141 s

Measured on BetterToken via /v1/images/generations (OpenAI-compatible) · Nov 4, 2026

How to verify any provider's 4K yourself →API docs ↗

Comparison

Nano Banana Pro vs Nano Banana 2: same prompt at 1K, 2K and 4K

Prompt (same for all 9 images)

A detailed e-commerce infographic for a mechanical wristwatch: the watch on a dark slate surface with a reflective sapphire crystal and brushed steel case, an exploded view of the movement gears on the right, four labeled callouts with thin leader lines ("Sapphire crystal", "42 mm steel case", "100 m water resistant", "72 h power reserve"), a small five-row specification table, a price tag "$299", and fine print at the bottom: "Free shipping · 2-year warranty · 30-day returns"

Detail crops. The same region is displayed at the same size to compare clarity.

Nano Banana Pro

1K: $0.05
2K: $0.07
4K: $0.08

Swipe to compare 1K, 2K and 4K →

Nano Banana Pro 1K mechanical watch infographic — Detail crops — 1K1024 × 1024 · $0.05

Nano Banana Pro 2K sample: mechanical watch infographic — 2K2048 × 2048 · $0.07

Nano Banana Pro 2K mechanical watch infographic — Detail crops — 2K2048 × 2048 · $0.07

Nano Banana Pro 4K sample: mechanical watch infographic — 4K4096 × 4096 · $0.08

Nano Banana Pro 4K mechanical watch infographic — Detail crops — 4K4096 × 4096 · $0.08

Nano Banana 2

1K: $0.04
2K: $0.06
4K: $0.07

Swipe to compare 1K, 2K and 4K →

Nano Banana 2 1K sample: mechanical watch infographic — 1K1024 × 1024 · $0.04

Nano Banana 2 1K mechanical watch infographic — Detail crops — 1K1024 × 1024 · $0.04

Nano Banana 2 2K sample: mechanical watch infographic — 2K2048 × 2048 · $0.06

Nano Banana 2 2K mechanical watch infographic — Detail crops — 2K2048 × 2048 · $0.06

Nano Banana 2 4K sample: mechanical watch infographic — 4K4096 × 4096 · $0.07

Nano Banana 2 4K mechanical watch infographic — Detail crops — 4K4096 × 4096 · $0.07

Nano Banana 2.1

1K: $0.04
2K: $0.06
4K: $0.07

Swipe to compare 1K, 2K and 4K →

Nano Banana 2.1 1K sample: mechanical watch infographic — 1K1024 × 1024 · $0.04

Nano Banana 2.1 1K mechanical watch infographic — Detail crops — 1K1024 × 1024 · $0.04

Nano Banana 2.1 2K sample: mechanical watch infographic — 2K2048 × 2048 · $0.06

Nano Banana 2.1 2K mechanical watch infographic — Detail crops — 2K2048 × 2048 · $0.06

Nano Banana 2.1 4K sample: mechanical watch infographic — 4K4096 × 4096 · $0.07

Nano Banana 2.1 4K mechanical watch infographic — Detail crops — 4K4096 × 4096 · $0.07

Model guide

Nano Banana 2 and 2.1 API pricing vs Nano Banana Pro

The same key calls all three models. Just change the model parameter.

Model guide	1K	2K	4K	Best for
Nano Banana Pro	$0.05	$0.07	$0.08	Highest quality, complex typography
Nano Banana 2	$0.04	$0.06	$0.07	Value and volume generation
Nano Banana 2.1	$0.04	$0.06	$0.07	Google's recommended new version

Gemini 3 Pro Image API (Nano Banana Pro)

Nano Banana Pro is Gemini 3 Pro Image. Nano Banana 2 and 2.1 are different models.

FAQ

Nano Banana Pro API FAQ

01Is the Nano Banana Pro API free?

No. Registration is free; image generation is paid. Add balance before your first image.

Start here · API docs ↗

02How much does the Nano Banana Pro API cost?

03What is the cheapest Nano Banana Pro API?

04How much does the Nano Banana 2 API cost?

05How do I get an API key? Do I need a Google Cloud project?

06Can I use Python or the OpenAI SDK?

07Do I get the image directly, or do I need to poll a task?

08Can I edit images or use inpainting?

09Does the Nano Banana Pro API support 4K?

10Are thinking tokens charged separately?

11Can I use the same key for other models?

12How can I pay?

13What are the rate limits?

Nano Banana Pro API

Nano Banana Pro API pricing: cost per image at 1K, 2K and 4K

Estimate your monthly cost

Top-up tiers

Get a Nano Banana Pro API key and make your first image

Try one image

Use the Nano Banana Pro API with OpenAI or Gemini SDKs

Two protocols. One direct response.

Nano Banana Pro resolution: 1K, 2K and 4K, tested

Nano Banana Pro vs Nano Banana 2: same prompt at 1K, 2K and 4K

Nano Banana Pro

Nano Banana 2

Nano Banana 2.1

Nano Banana 2 and 2.1 API pricing vs Nano Banana Pro

Gemini 3 Pro Image API (Nano Banana Pro)

Nano Banana Pro API FAQ

Your next image starts with one key.