How to choose gpt-4-0125-preview completion model to be used?

[lofti198]

Hi! Great package! My code:

            using var api = new OpenAIClient(_apiKey);
            var messages = new List<Message>
            {
                new Message(Role.System, instruction),
                new Message(Role.User, data),
            };
            var chatRequest = new ChatRequest(messages, OpenAI.Models.Model.GPT3_5_Turbo);
            var response = await api.ChatEndpoint.GetCompletionAsync(chatRequest);
            var choice = response.FirstChoice;

but how to choose gpt-4-0125-preview model?