Special custom endpoint not available

[JadynWong]

Confirm this is not an issue with the underlying OpenAI API

• This is an issue with the Python library

Confirm this is not an issue with Azure OpenAI

• This is not an issue with Azure OpenAI

Describe the bug

After the #186 merged (2.0.0-beta.10), special custom endpoints are no longer available. All clients have a '/v1' path prefix. This is different from the behavior of the Python version.

Such as https://open.bigmodel.cn/api/paas/v4 and other special custom endpoints.

To Reproduce

1. Execute chat completions by a special endpoint.

var client = new OpenAIClient("api-key", new()
        {
            Endpoint = new Uri("https://open.bigmodel.cn/api/paas/v4")
        });
var chatClient = client.GetChatClient("glm-4");
ChatCompletion completion = client.CompleteChat("Say 'this is a test.'");

Got 404 exception. The chat completions link is build as "https://open.bigmodel.cn/api/paas/v4/v1/chat/completions". It should be "https://open.bigmodel.cn/api/paas/v4/chat/completions".

Code snippets

No response

OS

windows

.NET version

8.0

Library version

2.0.0-beta.10

[joseharriaga]

Thank you for reaching out, @JadynWong ! I created the following PR reverting this change: 🔗 #192

It will go out in the next preview version, which we hope to release within the next few days.