This is a preview-tier image generation and editing model from Google, built for developers who want the latest Gemini 3.1 architecture with faster inference and sharper output. Reach for it when you need cost-effective, high-speed image synthesis or prompt-driven edits in production workflows.
Modalities
Text+Image → Image
Price
$0.046 / image
Speed
fast
Pricing
Per image. Async generation; you only pay for successful renders.
$0.046 / imageWhen to use Nano Banana 3 Flash (preview)
Where this model earns its cost — and where it doesn't.
Nano Banana 3 Flash is a preview release of Google’s Gemini 3.1 image generation model. It accepts text prompts and reference images, then outputs generated or modified images. The model is optimized for speed and sits in the cheap cost tier while delivering frontier-tier visual quality.
On Kyma, the model runs through an OpenAI-compatible endpoint with automatic failover across serving paths. Prompt caching is enabled, so repeated prompt prefixes are billed at 10% of the standard input rate. Every response returns the exact cost in the usage.cost field and identifies the executed model via the X-Kyma-Model header.
This is a preview build, so output consistency may shift as Google iterates. It does not support structured JSON outputs or reasoning traces, and it is strictly an image-to-image or text-to-image model. Google plans to retire the older nano-banana model in October 2026, making this the direct migration path.
Generate marketing assets
Produce high-resolution product and campaign visuals from text prompts at low cost.
Edit reference images
Modify existing photos using text instructions while preserving layout and composition.
Prototype UI mockups
Quickly render interface concepts and layout variations for early-stage design reviews.
Batch image synthesis
Run large-scale generation jobs where speed and cheap-tier pricing matter most.
Not ideal for: Do not use this model if you require guaranteed output stability, structured data extraction, or multi-step reasoning alongside image generation.
Quick start
Up and running in under two minutes.
- 1
Create an API key
Sign up and grab a key from the dashboard — $0.50 free credit, no card required.
Get API key → - 2
Make your first request
Submit a generation job and poll until it succeeds.
curl https://kymaapi.com/v1/images/generations \ -H "Authorization: Bearer YOUR_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "nano-banana-3-flash", "prompt": "A serene mountain lake at sunrise, photorealistic", "n": 1 }' # Response: { "id": "img_...", "status": "queued" } # Poll: GET /v1/jobs/{id} until status="succeeded"
FAQ
Common questions about this model.
How much does Nano Banana 3 Flash (preview) cost?
How do I use Nano Banana 3 Flash (preview)?
Does this model accept image inputs for editing?
How does prompt caching affect billing on Kyma?
Is this a stable release?
More models by Google
See all 18 →| Model | Context | Input | Output |
|---|---|---|---|
 Gemini 3.6 Flash | 1M | $2.025 | $10.125 |
| Gemini 3.5 Flash Lite | 1M | $0.405 | $3.375 |
| Gemini 3.5 Live Translate | — | $0.0635 / min | |
| Gemini 3.5 Flash | 1M | $2.025 | $12.15 |
 Gemma 4 31B | 128K | $0.0702 | $0.2006 |
| Gemini 3.1 Flash Live | — | $0.0389 / min | |
| Gemini 3 Flash (Audio) | — | $0.0026 / min | |
| Gemini 3 Flash | 1M | $0.3375 | $1.35 |