diff --git a/Pipfile b/Pipfile
index 4d4e956..6606116 100644
--- a/Pipfile
+++ b/Pipfile
@@ -6,12 +6,12 @@ name = "pypi"
 [packages]
 django = "==4.1.7"
 gunicorn = "==20.1.0"
-openai = "~=0.27.2"
+openai = "~=0.27.8"
 psycopg2 = "~=2.9.5"
 python-dotenv = "~=0.21.1"
 dj-database-url = "~=1.2.0"
 djangorestframework = "~=3.14.0"
-tiktoken = "~=0.3.2"
+tiktoken = "~=0.4.0"
 djangorestframework-simplejwt = "~=5.2.2"
 mysqlclient = "~=2.1.1"
 django-allauth = "~=0.52.0"
diff --git a/chat/views.py b/chat/views.py
index d0f1990..9b9d9a6 100644
--- a/chat/views.py
+++ b/chat/views.py
@@ -206,8 +206,20 @@ def delete_all(self, request):
     'gpt-4': {
         'name': 'gpt-4',
         'max_tokens': 8192,
-        'max_prompt_tokens': 6196,
+        'max_prompt_tokens': 6192,
         'max_response_tokens': 2000
+    },
+    'gpt-3.5-turbo-16k': {
+        'name': 'gpt-3.5-turbo-16k',
+        'max_tokens': 16384,
+        'max_prompt_tokens': 12384,
+        'max_response_tokens': 4000
+    },
+    'gpt-4-32k': {
+        'name': 'gpt-4-32k',
+        'max_tokens': 32768,
+        'max_prompt_tokens': 24768,
+        'max_response_tokens': 8000
     }
 }
 
@@ -784,13 +796,19 @@ def num_tokens_from_text(text, model="gpt-3.5-turbo-0301"):
         encoding = tiktoken.get_encoding("cl100k_base")
 
     if model == "gpt-3.5-turbo":
-        print("Warning: gpt-3.5-turbo may change over time. Returning num tokens assuming gpt-3.5-turbo-0301.")
-        return num_tokens_from_text(text, model="gpt-3.5-turbo-0301")
+        print("Warning: gpt-3.5-turbo may change over time. Returning num tokens assuming gpt-3.5-turbo-0613.")
+        return num_tokens_from_text(text, model="gpt-3.5-turbo-0613")
+    elif model == "gpt-3.5-turbo-16k":
+        print("Warning: gpt-3.5-turbo-16k may change over time. Returning num tokens assuming gpt-3.5-turbo-16k-0613.")
+        return num_tokens_from_text(text, model="gpt-3.5-turbo-16k-0613")
     elif model == "gpt-4":
         print("Warning: gpt-4 may change over time. Returning num tokens assuming gpt-4-0314.")
-        return num_tokens_from_text(text, model="gpt-4-0314")
+        return num_tokens_from_text(text, model="gpt-4-0613")
+    elif model == "gpt-4-32k":
+        print("Warning: gpt-4 may change over time. Returning num tokens assuming gpt-4-0314.")
+        return num_tokens_from_text(text, model="gpt-4-32k-0613")
 
-    if model not in ["gpt-3.5-turbo-0301", "gpt-4-0314"]:
+    if model not in ["gpt-3.5-turbo-0613", "gpt-4-0613", "gpt-3.5-turbo-16k-0613", "gpt-4-32k-0613"]:
         raise NotImplementedError(f"""num_tokens_from_text() is not implemented for model {model}.""")
 
     return len(encoding.encode(text))
@@ -804,17 +822,29 @@ def num_tokens_from_messages(messages, model="gpt-3.5-turbo-0301"):
         print("Warning: model not found. Using cl100k_base encoding.")
         encoding = tiktoken.get_encoding("cl100k_base")
     if model == "gpt-3.5-turbo":
-        print("Warning: gpt-3.5-turbo may change over time. Returning num tokens assuming gpt-3.5-turbo-0301.")
-        return num_tokens_from_messages(messages, model="gpt-3.5-turbo-0301")
+        print("Warning: gpt-3.5-turbo may change over time. Returning num tokens assuming gpt-3.5-turbo-0613.")
+        return num_tokens_from_messages(messages, model="gpt-3.5-turbo-0613")
+    elif model == "gpt-3.5-turbo-16k":
+        print("Warning: gpt-3.5-turbo-16 may change over time. Returning num tokens assuming gpt-3.5-turbo-16k-0613.")
+        return num_tokens_from_messages(messages, model="gpt-3.5-turbo-16k-0613")
     elif model == "gpt-4":
-        print("Warning: gpt-4 may change over time. Returning num tokens assuming gpt-4-0314.")
-        return num_tokens_from_messages(messages, model="gpt-4-0314")
-    elif model == "gpt-3.5-turbo-0301":
+        print("Warning: gpt-4 may change over time. Returning num tokens assuming gpt-4-0613.")
+        return num_tokens_from_messages(messages, model="gpt-4-0613")
+    elif model == "gpt-4-32k":
+        print("Warning: gpt-4 may change over time. Returning num tokens assuming gpt-4-0613.")
+        return num_tokens_from_messages(messages, model="gpt-4-32k-0613")
+    elif model == "gpt-3.5-turbo-0613":
         tokens_per_message = 4  # every message follows <|start|>{role/name}\n{content}<|end|>\n
         tokens_per_name = -1  # if there's a name, the role is omitted
-    elif model == "gpt-4-0314":
+    elif model == "gpt-3.5-turbo-16k-0613":
+        tokens_per_message = 4  # every message follows <|start|>{role/name}\n{content}<|end|>\n
+        tokens_per_name = -1  # if there's a name, the role is omitted
+    elif model == "gpt-4-0613":
         tokens_per_message = 3
         tokens_per_name = 1
+    elif model == "gpt-4-32k-0613":
+        tokens_per_message = 4  # every message follows <|start|>{role/name}\n{content}<|end|>\n
+        tokens_per_name = -1  # if there's a name, the role is omitted
     else:
         raise NotImplementedError(f"""num_tokens_from_messages() is not implemented for model {model}. See https://github.com/openai/openai-python/blob/main/chatml.md for information on how messages are converted to tokens.""")
     num_tokens = 0
diff --git a/requirements.txt b/requirements.txt
index cd68d93..c913fdb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ mysqlclient==2.1.1
 numexpr==2.8.4
 numpy==1.24.3
 oauthlib==3.2.2
-openai==0.27.6
+openai==0.27.8
 openapi-schema-pydantic==1.2.4
 packaging==23.1
 platformdirs==3.5.0
@@ -61,7 +61,7 @@ soupsieve==2.4.1
 SQLAlchemy==2.0.12
 sqlparse==0.4.4
 tenacity==8.2.2
-tiktoken==0.3.3
+tiktoken==0.4.0
 tomli==2.0.1
 tomlkit==0.11.8
 tqdm==4.65.0