From af29e633b2c070ff41e16e31048b469d00ec351f Mon Sep 17 00:00:00 2001
From: Paul Gauthier <aider@paulg.org>
Date: Tue, 2 Jul 2024 19:42:31 -0300
Subject: [PATCH] Handle max_input_tokens set with None #757

---
 aider/history.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/aider/history.py b/aider/history.py
index e80b80e1c..3615235c4 100644
--- a/aider/history.py
+++ b/aider/history.py
@@ -61,7 +61,11 @@ class ChatSummary:
         sized.reverse()
         keep = []
         total = 0
-        model_max_input_tokens = self.model.info.get("max_input_tokens", 4096) - 512
+
+        # These sometimes come set with value = None
+        model_max_input_tokens = self.model.info.get("max_input_tokens") or 4096
+        model_max_input_tokens -= 512
+
         for i in range(split_index):
             total += sized[i][0]
             if total > model_max_input_tokens: