diff --git a/aider/coder.py b/aider/coder.py
index cc9263822..47d4caec0 100755
--- a/aider/coder.py
+++ b/aider/coder.py
@@ -35,12 +35,12 @@ class Coder:
     def check_model_availability(self, main_model):
         available_models = openai.Model.list()
         model_ids = [model.id for model in available_models["data"]]
-        return main_model.value in model_ids
+        return main_model.name in model_ids
 
     def __init__(
         self,
         io,
-        main_model=models.GPT4.value,
+        main_model=models.GPT4.name,
         fnames=None,
         pretty=True,
         show_diffs=False,
@@ -84,7 +84,7 @@ class Coder:
         self.main_model = main_model
         if main_model == models.GPT35:
             self.io.tool_output(
-                f"Using {main_model.value} (experimental): disabling ctags/repo-maps.",
+                f"Using {main_model.name} (experimental): disabling ctags/repo-maps.",
             )
             self.gpt_prompts = prompts.GPT35()
         else:
@@ -435,7 +435,7 @@ class Coder:
 
     def send(self, messages, model=None, silent=False):
         if not model:
-            model = self.main_model.value
+            model = self.main_model.name
 
         self.resp = ""
         interrupted = False
@@ -620,7 +620,7 @@ class Coder:
     def get_commit_message(self, diffs, context):
         if len(diffs) >= 4 * 1024 * 4:
             self.io.tool_error(
-                f"Diff is too large for {models.GPT35.value} to generate a commit message."
+                f"Diff is too large for {models.GPT35.name} to generate a commit message."
             )
             return
 
@@ -634,12 +634,12 @@ class Coder:
         try:
             commit_message, interrupted = self.send(
                 messages,
-                model=models.GPT35.value,
+                model=models.GPT35.name,
                 silent=True,
             )
         except openai.error.InvalidRequestError:
             self.io.tool_error(
-                f"Failed to generate commit message using {models.GPT35.value} due to an invalid"
+                f"Failed to generate commit message using {models.GPT35.name} due to an invalid"
                 " request."
             )
             return
@@ -650,7 +650,7 @@ class Coder:
 
         if interrupted:
             self.io.tool_error(
-                f"Unable to get commit message from {models.GPT35.value}. Use /commit to try again."
+                f"Unable to get commit message from {models.GPT35.name}. Use /commit to try again."
             )
             return
 
@@ -780,7 +780,7 @@ class Coder:
         elif self.main_model == models.GPT35:
             method = self.update_files_gpt35
         else:
-            raise ValueError(f"apply_updates() doesn't support {self.main_model.value}")
+            raise ValueError(f"apply_updates() doesn't support {self.main_model.name}")
 
         try:
             edited = method(content)
diff --git a/aider/commands.py b/aider/commands.py
index a690970c7..4a0450504 100644
--- a/aider/commands.py
+++ b/aider/commands.py
@@ -15,7 +15,7 @@ class Commands:
     def __init__(self, io, coder):
         self.io = io
         self.coder = coder
-        self.tokenizer = tiktoken.encoding_for_model(coder.main_model.value)
+        self.tokenizer = tiktoken.encoding_for_model(coder.main_model.name)
 
     def is_command(self, inp):
         if inp[0] == "/":
diff --git a/aider/main.py b/aider/main.py
index 52ebb3228..3bba81d57 100644
--- a/aider/main.py
+++ b/aider/main.py
@@ -76,15 +76,15 @@ def main(args=None, input=None, output=None):
     parser.add_argument(
         "--model",
         metavar="MODEL",
-        default=models.GPT4.value,
-        help=f"Specify the model to use for the main chat (default: {models.GPT4.value})",
+        default=models.GPT4.name,
+        help=f"Specify the model to use for the main chat (default: {models.GPT4.name})",
     )
     parser.add_argument(
         "-3",
         action="store_const",
         dest="model",
-        const=models.GPT35.value,
-        help=f"Use {models.GPT35.value} model for the main chat (not advised)",
+        const=models.GPT35.name,
+        help=f"Use {models.GPT35.name} model for the main chat (not advised)",
     )
     parser.add_argument(
         "--pretty",
diff --git a/aider/repomap.py b/aider/repomap.py
index ab2147524..ef7e72975 100644
--- a/aider/repomap.py
+++ b/aider/repomap.py
@@ -88,7 +88,7 @@ class RepoMap:
         else:
             self.has_ctags = False
 
-        self.tokenizer = tiktoken.encoding_for_model(main_model.value)
+        self.tokenizer = tiktoken.encoding_for_model(main_model.name)
         self.repo_content_prefix = repo_content_prefix
 
     def get_repo_map(self, chat_files, other_files):