update oai models (#316)

Author: yiranwu0

autogen/oai/completion.py

@@ -51,6 +51,7 @@ class Completion(openai_Completion):
         "gpt-3.5-turbo-16k",
         "gpt-3.5-turbo-16k-0613",
         "gpt-35-turbo",
+        "gpt-35-turbo-16k",
         "gpt-4",
         "gpt-4-32k",
         "gpt-4-32k-0314",  # deprecate in Sep
@@ -69,11 +70,14 @@ class Completion(openai_Completion):
         "text-davinci-002": 0.02,
         "text-davinci-003": 0.02,
         "gpt-3.5-turbo": (0.0015, 0.002),
+        "gpt-3.5-turbo-instruct": (0.0015, 0.002),
         "gpt-3.5-turbo-0301": (0.0015, 0.002),  # deprecate in Sep
         "gpt-3.5-turbo-0613": (0.0015, 0.002),
         "gpt-3.5-turbo-16k": (0.003, 0.004),
         "gpt-3.5-turbo-16k-0613": (0.003, 0.004),
-        "gpt-35-turbo": 0.002,
+        "gpt-35-turbo": (0.0015, 0.002),
+        "gpt-35-turbo-16k": (0.003, 0.004),
+        "gpt-35-turbo-instruct": (0.0015, 0.002),
         "gpt-4": (0.03, 0.06),
         "gpt-4-32k": (0.06, 0.12),
         "gpt-4-0314": (0.03, 0.06),  # deprecate in Sep