Image generation gemini-2.5-flash-image controls aspect ratio

POST

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

Official documentation: https://ai.google.dev/gemini-api/docs/image-generation?hl=en-us#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

Example

{
  "contents": [
    {
      "role": "user",
      "parts": [
        {
          "text": "'Hi, This is a picture of me. Can you add a llama next to me"
        },
        {
          "inline_data": {
            "mime_type": "image/jpeg",
            "data": "iVBORw0KGgoAAAANSUhEUgAAAiEAAAIhCA... (base64)"
          }
        }
      ]
    }
  ],
  "generationConfig": {
    "responseModalities": [
      "TEXT",
      "IMAGE"
    ],
    "imageConfig": {
      "aspectRatio": "16:9"
    }
  }
}

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location -g --request POST 'https://api.key4u.shop/v1beta/models/gemini-2.5-flash-image:generateContent?key={{YOUR_API_KEY}}' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
  "contents": [
    {
      "role": "user",
      "parts": [
        {
          "text": "'\''Hi, This is a picture of me. Can you add a llama next to me"
        },
        {
          "inline_data": {
            "mime_type": "image/jpeg",
            "data": "iVBORw0KGgoAAAANSUhEUgAAAiEAAAIhCA... (base64)"
          }
        }
      ]
    }
  ],
  "generationConfig": {
    "responseModalities": [
      "TEXT",
      "IMAGE"
    ],
    "imageConfig": {
      "aspectRatio": "16:9"
    }
  }
}'

Responses

🟢200Success

application/json

Body

Example

{}

Modified at 2025-12-02 13:49:34

Image generation gemini-2.5-flash-image

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