How to Use Nano Banana via API with Gemini-2.5-Flash-Image-Preview

Introduction

Nano Banana API is a cost-effective way to work with powerful multimodal AI that handles text and image data. Built for speed and affordability, it offers over 50% savings compared to Gemini API pricing.

Prerequisites

Before you can start:

Obtain an API key from Wisdom Gate.
Understand the basics of REST APIs.
Have cURL or an API client ready.

Why Choose Nano Banana

Cost savings: Enjoy more than 50% reduction versus Gemini API rates.
Versatile model: Gemini-2.5-Flash-Image supports both text and image.
Low latency: Fast responses for production workloads.

Core Endpoints

Chat Completions (Text/Image Handling)

URL: https://wisdom-gate.juheapi.com/v1/chat/completions Authentication: Bearer token via Authorization header. Model: gemini-2.5-flash-image

Image Studio Interface

Visit the AI studio at Wisdom Gate Image Studio to prototype visual interactions without coding.

Step-by-Step Setup

Step 1: Get Your API Key

Step 2: Test Your First Request

Here's a minimal cURL example:

curl --location --request POST 'https://wisdom-gate.juheapi.com/v1/chat/completions' \
--header 'Authorization: YOUR_API_KEY' \
--header 'Content-Type: application/json' \
--data-raw '{
  "model":"gemini-2.5-flash-image",
  "messages": [
    {"role": "user", "content": "Draw a random picture."}
  ]
}'

The response will include choices containing generated text, potentially with image references.

Step 3: Integrate in Your App

JavaScript Example:

fetch('https://wisdom-gate.juheapi.com/v1/chat/completions', {
  method: 'POST',
  headers: {
    'Authorization': 'YOUR_API_KEY',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    model: 'gemini-2.5-flash-image',
    messages: [{ role: 'user', content: 'Describe this image' }]
  })
})
.then(res => res.json())
.then(console.log);

Python Example:

import requests
headers = {
    'Authorization': 'YOUR_API_KEY',
    'Content-Type': 'application/json'
}
body = {
    'model': 'gemini-2.5-flash-image',
    'messages': [{'role': 'user', 'content': 'Describe this image'}]
}
r = requests.post('https://wisdom-gate.juheapi.com/v1/chat/completions', headers=headers, json=body)
print(r.json())

Request Parameters Explained

model: Always gemini-2.5-flash-image for multimodal.
messages: List of conversation turns.
role: user, assistant, or system.
content: Payload text or image reference.

Best Practices

Keep prompts short and focused.
Store API keys in environment variables.
Monitor latency and adjust request frequency.

Advanced Use Cases

Generating Descriptive Captions From Images

Send an image URL in the prompt. Model will return detailed captions.

Interactive Visual Chatbots

Combine text instructions and image inputs for rich dialogues.

Troubleshooting

401 Unauthorized: Check your API key.
400 Bad Request: Ensure payload meets spec.
Timeouts: Retry with exponential backoff.

Comparison Snapshot vs Gemini API

Feature	Nano Banana API	Gemini API
Cost	~50% lower	Higher
Text + Image Support	Yes	Yes
Latency	Low	Moderate

Conclusion

Nano Banana API gives you fast, affordable multimodal AI integration. Start today by experimenting in the AI studio or integrating quickly into your app.