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Create image

post /images/generations

Creates an image given a prompt. Learn more.

Body Parameters

  • prompt: string

    A text description of the desired image(s). The maximum length is 32000 characters for the GPT image models, 1000 characters for dall-e-2 and 4000 characters for dall-e-3.

  • background: optional "transparent" or "opaque" or "auto"

    Allows to set transparency for the background of the generated image(s). This parameter is only supported for the GPT image models. Must be one of transparent, opaque or auto (default value). When auto is used, the model will automatically determine the best background for the image.

    If transparent, the output format needs to support transparency, so it should be set to either png (default value) or webp.

    • "transparent"

    • "opaque"

    • "auto"

  • model: optional string or ImageModel

    The model to use for image generation. One of dall-e-2, dall-e-3, or a GPT image model (gpt-image-1, gpt-image-1-mini, gpt-image-1.5). Defaults to dall-e-2 unless a parameter specific to the GPT image models is used.

    • string

    • ImageModel = "gpt-image-1.5" or "dall-e-2" or "dall-e-3" or 2 more

      • "gpt-image-1.5"

      • "dall-e-2"

      • "dall-e-3"

      • "gpt-image-1"

      • "gpt-image-1-mini"

  • moderation: optional "low" or "auto"

    Control the content-moderation level for images generated by the GPT image models. Must be either low for less restrictive filtering or auto (default value).

    • "low"

    • "auto"

  • n: optional number

    The number of images to generate. Must be between 1 and 10. For dall-e-3, only n=1 is supported.

  • output_compression: optional number

    The compression level (0-100%) for the generated images. This parameter is only supported for the GPT image models with the webp or jpeg output formats, and defaults to 100.

  • output_format: optional "png" or "jpeg" or "webp"

    The format in which the generated images are returned. This parameter is only supported for the GPT image models. Must be one of png, jpeg, or webp.

    • "png"

    • "jpeg"

    • "webp"

  • partial_images: optional number

    The number of partial images to generate. This parameter is used for streaming responses that return partial images. Value must be between 0 and 3. When set to 0, the response will be a single image sent in one streaming event.

    Note that the final image may be sent before the full number of partial images are generated if the full image is generated more quickly.

  • quality: optional "standard" or "hd" or "low" or 3 more

    The quality of the image that will be generated.

    • auto (default value) will automatically select the best quality for the given model.

    • high, medium and low are supported for the GPT image models.

    • hd and standard are supported for dall-e-3.

    • standard is the only option for dall-e-2.

    • "standard"

    • "hd"

    • "low"

    • "medium"

    • "high"

    • "auto"

  • response_format: optional "url" or "b64_json"

    The format in which generated images with dall-e-2 and dall-e-3 are returned. Must be one of url or b64_json. URLs are only valid for 60 minutes after the image has been generated. This parameter isn't supported for the GPT image models, which always return base64-encoded images.

    • "url"

    • "b64_json"

  • size: optional "auto" or "1024x1024" or "1536x1024" or 5 more

    The size of the generated images. Must be one of 1024x1024, 1536x1024 (landscape), 1024x1536 (portrait), or auto (default value) for the GPT image models, one of 256x256, 512x512, or 1024x1024 for dall-e-2, and one of 1024x1024, 1792x1024, or 1024x1792 for dall-e-3.

    • "auto"

    • "1024x1024"

    • "1536x1024"

    • "1024x1536"

    • "256x256"

    • "512x512"

    • "1792x1024"

    • "1024x1792"

  • stream: optional boolean

    Generate the image in streaming mode. Defaults to false. See the Image generation guide for more information. This parameter is only supported for the GPT image models.

  • style: optional "vivid" or "natural"

    The style of the generated images. This parameter is only supported for dall-e-3. Must be one of vivid or natural. Vivid causes the model to lean towards generating hyper-real and dramatic images. Natural causes the model to produce more natural, less hyper-real looking images.

    • "vivid"

    • "natural"

  • user: optional string

    A unique identifier representing your end-user, which can help OpenAI to monitor and detect abuse. Learn more.

Returns

  • ImagesResponse object { created, background, data, 4 more }

    The response from the image generation endpoint.

    • created: number

      The Unix timestamp (in seconds) of when the image was created.

    • background: optional "transparent" or "opaque"

      The background parameter used for the image generation. Either transparent or opaque.

      • "transparent"

      • "opaque"

    • data: optional array of Image

      The list of generated images.

      • b64_json: optional string

        The base64-encoded JSON of the generated image. Returned by default for the GPT image models, and only present if response_format is set to b64_json for dall-e-2 and dall-e-3.

      • revised_prompt: optional string

        For dall-e-3 only, the revised prompt that was used to generate the image.

      • url: optional string

        When using dall-e-2 or dall-e-3, the URL of the generated image if response_format is set to url (default value). Unsupported for the GPT image models.

    • output_format: optional "png" or "webp" or "jpeg"

      The output format of the image generation. Either png, webp, or jpeg.

      • "png"

      • "webp"

      • "jpeg"

    • quality: optional "low" or "medium" or "high"

      The quality of the image generated. Either low, medium, or high.

      • "low"

      • "medium"

      • "high"

    • size: optional "1024x1024" or "1024x1536" or "1536x1024"

      The size of the image generated. Either 1024x1024, 1024x1536, or 1536x1024.

      • "1024x1024"

      • "1024x1536"

      • "1536x1024"

    • usage: optional object { input_tokens, input_tokens_details, output_tokens, 2 more }

      For gpt-image-1 only, the token usage information for the image generation.

      • input_tokens: number

        The number of tokens (images and text) in the input prompt.

      • input_tokens_details: object { image_tokens, text_tokens }

        The input tokens detailed information for the image generation.

        • image_tokens: number

          The number of image tokens in the input prompt.

        • text_tokens: number

          The number of text tokens in the input prompt.

      • output_tokens: number

        The number of output tokens generated by the model.

      • total_tokens: number

        The total number of tokens (images and text) used for the image generation.

      • output_tokens_details: optional object { image_tokens, text_tokens }

        The output token details for the image generation.

        • image_tokens: number

          The number of image output tokens generated by the model.

        • text_tokens: number

          The number of text output tokens generated by the model.

Example

curl https://api.openai.com/v1/images/generations \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $OPENAI_API_KEY" \
    -d '{
          "prompt": "A cute baby sea otter",
          "background": "transparent",
          "moderation": "low",
          "n": 1,
          "output_compression": 100,
          "output_format": "png",
          "partial_images": 1,
          "quality": "medium",
          "response_format": "url",
          "size": "1024x1024",
          "style": "vivid",
          "user": "user-1234"
        }'

Response

{
  "created": 0,
  "background": "transparent",
  "data": [
    {
      "b64_json": "b64_json",
      "revised_prompt": "revised_prompt",
      "url": "url"
    }
  ],
  "output_format": "png",
  "quality": "low",
  "size": "1024x1024",
  "usage": {
    "input_tokens": 0,
    "input_tokens_details": {
      "image_tokens": 0,
      "text_tokens": 0
    },
    "output_tokens": 0,
    "total_tokens": 0,
    "output_tokens_details": {
      "image_tokens": 0,
      "text_tokens": 0
    }
  }
}

Generate image

curl https://api.openai.com/v1/images/generations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -d '{
    "model": "gpt-image-1.5",
    "prompt": "A cute baby sea otter",
    "n": 1,
    "size": "1024x1024"
  }'

Response

{
  "created": 1713833628,
  "data": [
    {
      "b64_json": "..."
    }
  ],
  "usage": {
    "total_tokens": 100,
    "input_tokens": 50,
    "output_tokens": 50,
    "input_tokens_details": {
      "text_tokens": 10,
      "image_tokens": 40
    }
  }
}

Streaming

curl https://api.openai.com/v1/images/generations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -d '{
    "model": "gpt-image-1.5",
    "prompt": "A cute baby sea otter",
    "n": 1,
    "size": "1024x1024",
    "stream": true
  }' \
  --no-buffer

Response

event: image_generation.partial_image
data: {"type":"image_generation.partial_image","b64_json":"...","partial_image_index":0}

event: image_generation.completed
data: {"type":"image_generation.completed","b64_json":"...","usage":{"total_tokens":100,"input_tokens":50,"output_tokens":50,"input_tokens_details":{"text_tokens":10,"image_tokens":40}}}
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