The input provided is not of the expected string type. Ensure the input adheres to the format requirements and try again.

The 400 Bad Request error in the OpenAI API typically indicates that the server was unable to understand the request due to invalid syntax or configuration. Here are some possible reasons why you might be encountering this error:

Invalid API Key or Authentication

The API key used in your request might be incorrect, expired, or not properly configured.

Incorrect Request Parameters

The parameters in your request, such as the input data or template, might not be in the correct format or type. For example, the error message suggests that the prompt field is expected to be a string, but the provided input is not of that type.

Rate Limiting

You might be exceeding the rate limits set by OpenAI, leading to the API rejecting your requests with a 400 error.

Invalid Model or Parameters

The model specified in your request might not support certain parameters or configurations. For instance, an error could occur if the model does not support specifying certain dimensions or other parameters.

Network or Server Issues

There could be issues with network traffic or server-side problems that are causing the request to be malformed or misunderstood by the server.

In your specific case, the error message indicates that the prompt field is not of type string, which suggests an issue with the format or type of the input data you are providing.