The specified model does not exist or you do not have access to it.

If you are encountering a 404 error when trying to access specific OpenAI models, there are several potential reasons and steps you can take to resolve the issue:

Model Access and Existence

• The error often indicates that the model you are trying to access either does not exist or you do not have the necessary permissions to use it. For example, models like gpt-3.5-turbo or gpt-4-1106-preview might not be available to your account due to access restrictions.

API Endpoint and Parameters

• Ensure you are using the correct API endpoint and parameters. Switching models can sometimes require adjusting the endpoint or the request parameters. For instance, using the wrong endpoint or model name can result in a 404 error.

Account and Billing Details

• Make sure your OpenAI account has the necessary billing details and subscriptions to access the models you are trying to use. Missing or incomplete billing information can prevent access to certain models.

API Version and Configuration

• Verify that you are using the correct version of the OpenAI API and that your configuration is up to date. Using an outdated API version or incorrect configuration can lead to errors, especially if there have been recent changes to the API.

Tier and Model Availability

• If you are a Tier 5 user or other specific tiers, ensure that the models you are trying to access are indeed available to your tier. There might be delays in rollout or specific restrictions that apply.

To resolve the issue, you can:

• Check your account permissions and ensure you have access to the model.

• Verify the API endpoint and parameters are correct for the model you are using.

• Update your API version and configuration.

• Ensure your billing details are complete and up to date.

By addressing these potential issues, you should be able to resolve the 404 error and successfully use the desired OpenAI models.