Image generation gemini-2.5-flash-image

POST

https://api.key4u.vn/v1beta/models/gemini-2.5-flash-image:generateContent

Official documentation: https://ai.google.dev/gemini-api/docs/image-generation?hl=zh-cn#gemini-image-editing

Request

Authorization

Provide your bearer token in the

Authorization

header when making requests to protected resources.

Example:

Authorization: Bearer ********************

Query Params

Header Params

Body Params application/json

Examples

Responses

🟢200

application/json

Bodyapplication/json

🟠400Bad request or validation failed

🟠401Missing or invalid API Key

Request Example

Shell

JavaScript

Java

Swift

cURL

gemini_25_flash_image_singlegemini_25_flash_image_single_2

curl --location --globoff 'https://api.key4u.vn/v1beta/models/gemini-2.5-flash-image:generateContent?key={{YOUR_API_KEY}}' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "contents": [
    {
      "parts": [
        {
          "text": "'\''Hi, This is a picture of me. Can you add a llama next to me"
        },
        {
          "inline_data": {
            "data": "iVBORw0KGgoAAAANSUhEUgAABAAAAAKoCAIA...",
            "mime_type": "image/jpeg"
          }
        }
      ],
      "role": "user"
    }
  ],
  "generationConfig": {
    "imageConfig": {
      "aspectRatio": "16:9"
    },
    "responseModalities": [
      "TEXT",
      "IMAGE"
    ]
  }
}'

Response Example

200 - example

{
  "id": "resp_example",
  "object": "response",
  "status": "completed"
}

Modified at 2026-10-13 12:32:40

Image generation

Image generation gemini-3-pro-image-preview controls aspect ratio + clarity