Description
The Nano Banana API suite on Kie.ai gives developers unified access to Google's Gemini image models for text-to-image and image-to-image generation through a single REST API. It packages two tiers: the Standard Nano Banana API, built on Gemini 2.5 Flash Image for fast, language-driven edits at the lowest cost, and the Nano Banana Pro API, built on Gemini 3 Pro Image for studio-grade quality, precise text rendering, and complex instruction following.
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The Standard tier is engineered for real-time applications, high-volume batch processing, and instant previews, delivering outputs in tens of seconds while preserving scene integrity across iterative edits. The Pro tier targets professional creators and enterprises, supporting 1K, 2K, and 4K resolutions, a 64K input and 32K output context window for long structured prompts, multi-turn editing that refines results without full regeneration, composition of up to 8 to 14 reference images with consistent lighting and perspective, search-grounded accuracy for diagrams and infographics, consistent character identity, and multilingual text rendering for localized designs.
Access uses a unified API key that works for both tiers, so developers can switch between the google/nano-banana and google/nano-banana-pro models using the same authentication flow. Requests are sent as POST calls with a prompt, optional image references, and settings such as aspect ratio, resolution, and output format, and results can be retrieved by polling status or via a callback URL. Kie.ai provides unified documentation, high-concurrency infrastructure, and stable performance.
Pricing is pay-as-you-go through a credit system with no mandatory subscriptions. The Standard Nano Banana API starts at roughly $0.02 per image, while the Pro API starts at about 24 credits (around $0.12) per image, described as roughly 20% cheaper than the official Google price. Free initial credits are available.
- CategoryAI Image Generators
- Pricing ModelUsage-based
- DeploymentCloud
- PlatformsWeb
Kie.ai Nano Banana API's Core Features
Unified REST API for text-to-image and image editing
Standard tier on Gemini 2.5 Flash for fast, low-cost edits
Pro tier on Gemini 3 Pro Image for studio-grade quality
1K, 2K, and 4K resolution output on the Pro tier
Multi-turn editing and up to 8-14 reference-image composition
Flawless text rendering and multilingual localization
Single API key with easy switching between models
Pay-as-you-go credits with no mandatory subscription
How to use Kie.ai Nano Banana API?
Sign up: Create a free Kie.ai account and get a unified API key.
Choose a model: Pick google/nano-banana for speed or google/nano-banana-pro for quality.
Send a request: POST your prompt, image references, and settings such as aspect ratio and resolution.
Retrieve results: Poll the task status or receive output via a callback URL.
Integrate: Wire the results into your app or creative workflow.
Kie.ai Nano Banana API's Use Cases
- Real-time image editing apps
- Print and packaging design
- Multi-reference composition
- Localized campaigns
- Consistent character design
