diff --git a/bot/openai_utils.py b/bot/openai_utils.py
index 423a3a9..cdb0110 100644
--- a/bot/openai_utils.py
+++ b/bot/openai_utils.py
@@ -44,7 +44,7 @@ class ChatGPT:
                     )
                     answer = r.choices[0].text
                 else:
-                    raise ValueError(f"Unknown model: {model}")
+                    raise ValueError(f"Unknown model: {self.model}")
 
                 answer = self._postprocess_answer(answer)
                 n_input_tokens, n_output_tokens = r.usage.prompt_tokens, r.usage.completion_tokens
@@ -193,4 +193,4 @@ async def generate_images(prompt, n_images=4):
 
 async def is_content_acceptable(prompt):
     r = await openai.Moderation.acreate(input=prompt)
-    return not all(r.results[0].categories.values())
\ No newline at end of file
+    return not all(r.results[0].categories.values())