diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 550ba38c8..8aa4ecba1 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -189,7 +189,11 @@ class Coder:
         for fname in self.get_inchat_relative_files():
             self.io.tool_output(f"Added {fname} to the chat.")
 
-        self.summarizer = ChatSummary(models.Model.weak_model())
+        self.summarizer = ChatSummary(
+            models.Model.weak_model(),
+            self.main_model.max_chat_history_tokens,
+        )
+
         self.summarizer_thread = None
         self.summarized_done_messages = []
 
diff --git a/aider/models/model.py b/aider/models/model.py
index 7522c97e0..9b1a3daab 100644
--- a/aider/models/model.py
+++ b/aider/models/model.py
@@ -8,6 +8,7 @@ class Model:
     edit_format = None
     max_context_tokens = 0
     tokenizer = None
+    max_chat_history_tokens = 1024
 
     always_available = False
     use_repo_map = False
diff --git a/aider/models/openai.py b/aider/models/openai.py
index 75f2808c9..e6674d769 100644
--- a/aider/models/openai.py
+++ b/aider/models/openai.py
@@ -40,12 +40,15 @@ class OpenAIModel(Model):
             if tokens == 8:
                 self.prompt_price = 0.03
                 self.completion_price = 0.06
+                self.max_chat_history_tokens = 1024
             elif tokens == 32:
                 self.prompt_price = 0.06
                 self.completion_price = 0.12
+                self.max_chat_history_tokens = 3 * 1024
             elif tokens == 128:
                 self.prompt_price = 0.01
                 self.completion_price = 0.03
+                self.max_chat_history_tokens = 4 * 1024
 
             return
 
@@ -56,12 +59,15 @@ class OpenAIModel(Model):
             if self.name == "gpt-3.5-turbo-1106":
                 self.prompt_price = 0.001
                 self.completion_price = 0.002
+                self.max_chat_history_tokens = 3 * 1024
             elif tokens == 4:
                 self.prompt_price = 0.0015
                 self.completion_price = 0.002
+                self.max_chat_history_tokens = 1024
             elif tokens == 16:
                 self.prompt_price = 0.003
                 self.completion_price = 0.004
+                self.max_chat_history_tokens = 2 * 1024
 
             return