The requested operation is not supported on the current API endpoint. Please verify the endpoint URL and ensure it is appropriate for the intended request type.

The 404 error you are encountering with the OpenAI API is likely due to using an incorrect endpoint for the model you are trying to access. Here are the key reasons:

Incorrect Endpoint

• You might be using the /v1/completions endpoint for a model that is not supported there, such as gpt-3.5-turbo or gpt-4, which are chat models. These models are not compatible with the /v1/completions endpoint.

Model Compatibility

• The /v1/completions endpoint supports specific models designed for text completion tasks, like davinci-002, but not chat-specific models. Using a chat model with this endpoint will result in a 404 error because the model is not supported there.

Endpoint and Model Mismatch

• If you are trying to use a model that requires the /v1/chat/completions endpoint (e.g., gpt-3.5-turbo or gpt-4), using the wrong endpoint will cause the API to return a 404 error.