openai
#10100
input_format_error
Invalid chat format: missing required "url" field in image_url dictionary.
This error has been identified and solved.
Reason
The error message "Invalid chat format. Expected 'url' field in image_url dict" when encountering a 400 status code in the OpenAI API indicates that the request payload is not formatted correctly according to the API's expectations.
Here are the key reasons for this error:
Incorrect Payload Structure: The API expects the image data to be provided in a specific format, typically as an
image_urltype, which should contain a valid URL. However, the current payload might be missing the requiredurlfield or incorrectly structured.Unexpected Keys: The request might include unexpected keys or parameters that do not match the expected format for the model, specifically the
gpt-4-vision-previewmodel which has strict requirements for how image and text data are presented.Model-Specific Requirements: Different models have different requirements for how data should be formatted. The
gpt-4-vision-previewmodel, in particular, requires a precise format for handling both text and image data, and any deviation from this format can result in a 400 error.
Solution
To fix the "Invalid chat format: missing required 'url' field in image_url dictionary" error, you need to ensure that your request payload is structured correctly according to the OpenAI API's expectations. Here are the key adjustments to make:
Ensure that the
image_urltype contains a nested dictionary with aurlfield.Remove any unexpected keys or parameters that do not match the expected format.
Use the correct model-specific format, particularly for the
gpt-4-vision-previewmodel.
Here are the essential points to correct:
Nest the
urland any additional details (likedetail) within theimage_urldictionary.Verify that the
contentfield is an array of content objects with the correct types (textorimage_url).Ensure that base64 encoded images are converted to a data URL and included in the
image_urlfield correctly.
