Last updated 06-29-2026
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Nano Banana Pro API - Kie.ai
Nano Banana Pro API on Kie.ai gives developers API access to Google DeepMind's Nano Banana Pro image model (Gemini 3.0 Pro Image) for text-to-image and image-to-image workflows. Kie.ai hosts the model behind a developer dashboard with a playground, API keys, usage logs, and documentation so teams can test prompts and ship integrations without running their own GPU stack.
The model targets sharper 2K output with intelligent 4K scaling, stronger text rendering inside images, and more stable character consistency than the earlier Nano Banana generation. Kie.ai positions the endpoint for production pipelines that need predictable visual quality across marketing assets, storyboards, product shots, and localized creative variants.
Developers call the API with a text prompt and optional reference images (up to eight JPEG, PNG, or WEBP files at 30MB each), then choose aspect ratio, resolution (1K, 2K, or 4K), and output format (PNG or JPG). A built-in playground mirrors runtime behavior before you wire REST or SDK calls into your app.
Kie.ai runs on a pay-as-you-go credit balance with per-image rates published on the product page, plus request logs, quota monitoring, and 24/7 support for production deployments.
Ship text-to-image or image-to-image calls with up to eight reference uploads
Pick 1K, 2K, or 4K output plus aspect ratios from square to ultrawide
Test prompts in a playground that matches live API behavior
Get sharper in-image text and steadier character consistency vs the first Nano Banana API
Pay per image with published credit rates lower than several rival API hosts
Published per-image rates under Replicate, Fal.ai, and Google Vertex AI on Kie.ai's comparison table.
Playground lets you validate prompts and parameters before writing integration code.
Supports up to eight reference images with flexible aspect ratios and 1K to 4K output.
Pay-as-you-go credits with no subscription requirement on the product page.
Kie.ai credits do not expire per the site's terms of use.
Requires a Kie.ai account and prepaid credits; there is no permanent free tier listed for this API.
Pricing is credit-based, so heavy batch jobs need active balance monitoring.
Model access is routed through Kie.ai rather than direct Google Cloud billing.
How much does Nano Banana Pro API cost on Kie.ai?
Kie.ai lists Nano Banana Pro API at 18 credits (about $0.09) per 1K or 2K image and 24 credits (about $0.12) per 4K image. High-tier credit top-ups include a 10% bonus that lowers the effective rate to about $0.082 for 1K/2K and $0.11 for 4K.
What input formats does Nano Banana Pro API accept?
Nano Banana Pro API on Kie.ai accepts JPEG, PNG, and WEBP reference images. You can attach up to eight images per request, with a 30MB size limit per file.
Does Nano Banana Pro API support both text-to-image and image-to-image?
Yes. Kie.ai exposes Nano Banana Pro API for text-to-image generation from prompts and image-to-image editing when you supply reference images in the request.
Can I try Nano Banana Pro API before integrating it?
Yes. Kie.ai provides a playground on the Nano Banana Pro product page where you can adjust prompts, aspect ratio, resolution, and output format and see results before adding the API to your code.
Do Kie.ai credits expire?
According to Kie.ai's terms of use, purchased credits (tokens) do not expire. Kie.ai also states that refunds are supported when needed.