Invalid model configuration. The model argument should be left blank.

The 400 - Bad Request error in the OpenAI API can be triggered by several factors. Here are some concise explanations for why you might be seeing this error:

Incorrect or Expired API Keys

A common cause is using an incorrect or expired API key. This can prevent the server from understanding the request, leading to a 400 error.

Invalid Request Parameters

The error can occur if the request parameters, such as the model, prompt, or other configuration settings, are not properly set or are of the wrong data type. For example, using text instead of numeric types for parameters like temperature or max_tokens can cause this error.

Middleware and Axios Configuration Issues

Incorrect configuration of Axios, such as an incorrect base URL or improperly set headers (e.g., the Authorization field), can also lead to a 400 error.

Rate Limiting and Throttling

Exceeding the rate limits set by OpenAI can result in a 400 error. This happens when the API is called too frequently within a given time frame.

Model-Specific Constraints

Using model-specific parameters that are not supported by the chosen model can trigger a 400 error. For instance, specifying dimensions for a model that does not support it can lead to this error.

Other Configuration Issues

Other misconfigurations, such as hidden characters in environment variables or incorrect values for required properties (e.g., the content property), can also cause the 400 error.