Nano Banana 2
Nano Banana 2 is Google's Gemini 3.1 Flash Image model, generating and editing images at Flash-level speed with 2K/4K upscaling. Access it through Velokey's unified endpoint with below-list pricing.
Use cases
Greeting cards & marketing mockups · Educational infographics & diagrams
Input
Text or image
Output
Image
Billing
Per image
Sign up to get $0.5 in free credits — about 20 free images
Generate an image
Enter a prompt and click Generate
Nano Banana 2 examples
👆 Click on any example above to view full details, prompt, and parameters
Pricing details
Transparent usage-based pricing with no hidden fees.
Detailed Pricing
Usage-based pricing breakdown
| Spec | Price | Official | Savings |
|---|---|---|---|
| 1K/image | 0.0094 Credits≈$0.0094 | 0.0118 Credits | -20% |
| 2K/image | 0.0191 Credits≈$0.0191 | 0.0238 Credits | -20% |
| 4K/image | 0.0316 Credits≈$0.0316 | 0.0395 Credits | -20% |
Billing Rules
- Output price varies by model, resolution, quality, duration, or token usage.
- Uploaded reference files may be charged separately when supported.
- Add-on capabilities such as web search or image search may be billed per request.
- Token-based models are billed by input and output tokens.
- If the primary route is unavailable, Velokey may automatically switch to a stable fallback route when possible.
- Usage is pay-as-you-go with transparent credit deduction.
* Final cost depends on the generated result.
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Affordable Nano Banana 2 API
Access Google's Nano Banana 2 (Gemini 3.1 Flash Image) on Velokey — Flash-level speed, 2K/4K editing, multilingual text rendering, and strong consistency, with a unified endpoint and below-list pricing for production creative workflows.
Meet Nano Banana 2 and its API access
Nano Banana 2 is Google's image model built on Gemini 3.1 Flash Image, delivering state-of-the-art image generation and editing at Flash-level speed. It upscales edits to 2K and 4K and supports flexible aspect ratios (square, portrait, landscape); it renders legible multilingual text directly in images with in-image translation; and it maintains up to five characters and fourteen objects consistently across workflows while grounding content in Gemini's knowledge base and web search for accuracy. Generated images include a SynthID digital watermark. Velokey provides an affordable, easy-to-integrate Nano Banana 2 API: a unified image endpoint, a clear request flow, and below-list pricing for creative production, marketing, and automation workflows.
Flash-level speed
State-of-the-art image generation and editing at Flash-level speed, with editing latency under 20 seconds — roughly 74–76% faster than previous versions, fit for batch rendering and fast iteration.
View Documentation →
Legible multilingual text & in-image translation
Renders legible text directly in images with control over fonts, styles, and sizes, plus multilingual support and in-image translation, with strong short-text rendering across scripts — fit for localized posters and marketing assets.
View Documentation →
5-character / 14-object consistency
Maintains up to five characters across workflows, preserves the fidelity of up to fourteen objects, and keeps narrative continuity across scenes — fit for storyboards and series creative.
View Documentation →
2K/4K editing with knowledge grounding
Upscales edits to 2K and 4K and grounds content in Gemini's knowledge base and web search for accuracy, and can switch environmental context (such as changing city skylines).
View Documentation →
How to deploy the Nano Banana 2 API on Velokey
Get started with just a few steps.
Sign up and get an API Key
Sign in to the Velokey console to generate an API Key that authenticates every image request sent to Nano Banana 2.
Configure request parameters
Set model to nano-banana-2 and submit a prompt to generate, or attach reference images to edit and upscale to 2K/4K, and set the target aspect ratio.
Integrate and start calling
Send requests to Velokey's unified endpoint to power creative production, marketing, and automation, with usage managed in one console.
Real-world use cases for Nano Banana 2
From creative design to localization, covering many image-production scenarios.
Greeting cards & marketing mockups
With precise typography, quickly produce greeting cards, posters, and marketing mockups with legible text.
Educational infographics & diagrams
Generate educational infographics and diagrams grounded in real-world knowledge for accurate, clear content.
Product photography enhancement
Edit and upscale product images to 2K/4K to boost the quality and clarity of product photos.
Storyboards with consistent characters
Keep characters and objects consistent across scenes — fit for storyboarding and continuous narratives.
Multi-language localization
Translate text within images to other languages and switch environmental context to produce localized assets fast.
Infographic & diagram production
With knowledge grounding and text rendering, batch-generate accurate, legible infographics and diagrams.
Why choose Velokey for Nano Banana 2
Discount on list price
Call Nano Banana 2 at a lower price on Velokey — pay-as-you-go with no forced subscription, reducing upfront cost.
Unified API interface
One API Key accesses Nano Banana 2 and other models — no juggling multiple accounts and keys, simplifying integration.
Complete docs and onboarding guidance
Endpoint references, parameter details, and examples help you quickly adopt image generation, editing, and localization.
Stable and highly available
Automatic failover and stable fallback routes maintain availability when the primary route is down, keeping production reliable.
API Reference
Complete API call examples and parameter descriptions
Endpoint
https://api.velokey.ai/v1beta/models/{model}:generateContentAuthentication
Bearer YOUR_API_KEYRequest Example
curl https://api.velokey.ai/v1beta/models/{model}:generateContent \
-X POST \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gemini-3.1-flash-image-preview",
"prompt": "A premium product photo...",
"size": "1024x1024",
"quality": "high"
}'Response Example
{
"id": "req_abc123",
"model": "gemini-3.1-flash-image-preview",
"created": 1234567890,
"data": { ... }
}Nano Banana 2 API FAQ
What model is Nano Banana 2?
It's Google's Gemini 3.1 Flash Image model, marketed as Nano Banana 2, with model id nano-banana-2 — focused on image generation and editing at Flash-level speed.
What resolutions are supported?
Editing can upscale images to 2K and 4K resolution, with flexible aspect ratios including square, portrait, and landscape.
How good is text rendering?
It renders legible text directly in images with control over fonts, styles, and sizes, plus multilingual support and in-image translation, with strong short-text rendering across scripts.
How much consistency does it keep?
It maintains up to five characters across workflows, preserves the fidelity of up to fourteen objects, and keeps narrative continuity across scenes; generated images include a SynthID digital watermark.
How is it billed on Velokey?
This page's pricing area shows the current Velokey price, billed by usage with a discount on list price.
Start building with Nano Banana 2 today
Use one API key to access low-cost, stable AI models through Velokey.