Add support for new OpenAI models and "Function Calling"

Today OpenAI released new updated models and capability. Pls add/enable it on next update: gpt-3.5-turbo-16k offers 4 times the context length of gpt-3.5-turbo at twice the price: $0.003 per 1K input tokens and $0.004 per 1K output tokens. 16k context means the model can now support ~20 pages of text in a single request. gpt-3.5-turbo-0613 including "function calling" gpt-4-0613 including "function calling" gpt-4-32k-0613 includes the same improvements as gpt-4-0613, along with an extended context length for better comprehension of larger texts. Also, explore the posibility to implement "function calling" capability, maybe in future. You can know more here: [](https://openai.com/blog/function-calling-and-other-api-updates) Tks in advance. Best Regards.