WaveSpeedAI Nano Banana 2 Image Generation/Editing

---

name: wavespeed-nano-banana-2

description: Generate and edit images using Google's Nano Banana 2 model via WaveSpeed AI. Supports text-to-image generation and image editing with natural language prompts. Features native 4K resolution, flexible aspect ratios including ultra-narrow (1:8, 8:1), multilingual text rendering, and camera-style controls. Use when the user wants to create images from text or edit existing images.

metadata:

author: wavespeedai

version: "1.0"

---

# WaveSpeedAI Nano Banana 2 Image Generation/Editing

Generate and edit images using Google's Nano Banana 2 model via the WaveSpeed AI platform. Supports both text-to-image generation and natural-language image editing with up to 14 input images.

Authentication

export WAVESPEED_API_KEY="your-api-key"

Get your API key at [wavespeed.ai/accesskey](https://wavespeed.ai/accesskey).

Quick Start

Text-to-Image

import wavespeed from 'wavespeed';

const output_url = (await wavespeed.run(
  "google/nano-banana-2/text-to-image",
  { prompt: "A serene Japanese garden with cherry blossoms, watercolor style" }
))["outputs"][0];

Image Editing

The `images` parameter accepts an array of image URLs. If you have local files, upload them first with `wavespeed.upload()` to get a URL.

import wavespeed from 'wavespeed';

// Upload a local image to get a URL
const imageUrl = await wavespeed.upload("/path/to/photo.png");

const output_url = (await wavespeed.run(
  "google/nano-banana-2/edit",
  {
    images: [imageUrl],
    prompt: "Replace the sky with a dramatic sunset"
  }
))["outputs"][0];

You can also pass existing image URLs directly:

const output_url = (await wavespeed.run(
  "google/nano-banana-2/edit",
  {
    images: ["https://example.com/photo.jpg"],
    prompt: "Replace the sky with a dramatic sunset"
  }
))["outputs"][0];

API Endpoints

Text-to-Image

**Model ID:** `google/nano-banana-2/text-to-image`

Generate images from text prompts.

#### Parameters

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| `prompt` | string | Yes | -- | Text description of the image to generate |

| `aspect_ratio` | string | No | -- | Output aspect ratio. One of: `1:1`, `3:2`, `2:3`, `3:4`, `4:3`, `4:5`, `5:4`, `9:16`, `16:9`, `21:9`, `1:4`, `4:1`, `1:8`, `8:1` |

| `resolution` | string | No | `1k` | Image resolution. One of: `1k`, `2k`, `4k` |

| `output_format` | string | No | `png` | Output format. One of: `png`, `jpeg` |

#### Example

import wavespeed from 'wavespeed';

const output_url = (await wavespeed.run(
  "google/nano-banana-2/text-to-image",
  {
    prompt: "A red vintage Porsche 911 on a winding mountain road at golden hour, photorealistic",
    aspect_ratio: "16:9",
    resolution: "2k",
    output_format: "png"
  }
))["outputs"][0];

Image Editing

**Model ID:** `google/nano-banana-2/edit`

Edit existing images using natural language prompts. Supports up to 14 input images.

#### Parameters

| Parameter | Type | Required | Default | Description |

|-----------|------|----------|---------|-------------|

| `images` | string[] | Yes | `[]` | URLs of input images to edit (1-14 images) |

| `prompt` | string | Yes | -- | Text description of the desired edit |

| `aspect_ratio` | string | No | -- | Output aspect ratio. One of: `1:1`, `3:2`, `2:3`, `3:4`, `4:3`, `4:5`, `5:4`, `9:16`, `16:9`, `21:9`, `1:4`, `4:1`, `1:8`, `8:1` |

| `resolution` | string | No | `1k` | Image resolution. One of: `1k`, `2k`, `4k` |

| `output_format` | string | No | `png` | Output format. One of: `png`, `jpeg` |

#### Example

import wavespeed from 'wavespeed';

// Upload local images first, or use existing URLs
const imageUrl = await wavespeed.upload("/path/to/living-room.png");

const output_url = (await wavespeed.run(
  "google/nano-banana-2/edit",
  {
    images: [imageUrl],
    prompt: "Change the wall color to warm terracotta and add indoor plants",
    aspect_ratio: "16:9",
    resolution: "4k",
    output_format: "png"
  }
))["outputs"][0];

#### Multi-Image Editing

// Upload multiple local images
const faceUrl = await wavespeed.upload("/path/to/face.png");
const hairstyleUrl = await wavespeed.upload("/path/to/hairstyle.png");

const output_url = (await wavespeed.run(
  "google/nano-banana-2/edit",
  {
    images: [faceUrl, hairstyleUrl],
    prompt: "Apply the hairstyle from the second image to the person in the first image"
  }
))["outputs"][0];

Advanced Usage

Sync Mode

Use sync mode for a single request that waits for the result without polling:

const output_url = (await wavespeed.run(
  "google/nano-banana-2/text-to-image",
  { prompt: "A minimalist logo for a coffee shop" },
  { enableSyncMode: true }
))["outputs"][0];

Custom Client with Retry Configuration

import { Client } from 'wavespeed';

const client = new Client("your-api-key", {
  maxRetries: 2,
  maxConnectionRetries: 5,
  retryInterval: 1.0,
});

const output_url = (await client.run(
  "google/nano-banana-2/text-to-image",
  { prompt: "A futuristic cityscape at dusk" }
))["outputs"][0];

Error Handling with runNoThrow

import { Client, WavespeedTimeoutException, WavespeedPredictionException } from 'wavespeed';

const client = new Client();
const result = await client.runNoThrow(
  "google/nano-banana-2/text-to-image",
  { prompt: "A cat wearing a top hat" }
);

if (result.outputs) {
  console.log("Image URL:", result.outputs[0]);
  console.log("Task ID:", result.detail.taskId);
} else {
  console.log("Failed:", result.detail.error.message);
  if (result.detail.error instanceof WavespeedTimeoutException) {
    console.log("Request timed out - try increasing timeout");
  } else if (result.detail.error instanceof WavespeedPredictionException) {
    console.log("Model prediction failed");
  }
}

Aspect Ratio Options

| Aspect Ratio | Use Case |

|-------------|----------|

| `1:1` | Square — social media posts, profile pictures |

| `3:2` | Landscape — standard photography |

| `2:3` | Portrait — standard photography |

| `3:4` | Portrait — social media, product images |

| `4:3` | Landscape — presentations, web content |

| `4:5` | Portrait — Instagram posts |

| `5:4` | Landscape — print, web banners |

| `9:16` | Vertical — mobile wallpapers, stories |

| `16:9` | Widescreen — desktop wallpapers, video thumbnails |

| `21:9` | Ultra-wide — cinematic, panoramic |

| `1:4` | Ultra-tall — vertical banners, tall infographics |

| `4:1` | Ultra-wide — horizontal banners, letterbox |

| `1:8` | Extreme vertical — scrolling banners, tower ads |

| `8:1` | Extreme horizontal — panoramic strips, timelines |

Resolution and Pricing

| Resolution | Cost |

|------------|------|

| 1k | $0.08 per image |

| 2k | $0.12 per image |

| 4k | $0.16 per image |

Prompt Tips

Security Constraints