diff --git a/metagpt/provider/openai_api.py b/metagpt/provider/openai_api.py
index 2722491d0..bf2ca7f14 100644
--- a/metagpt/provider/openai_api.py
+++ b/metagpt/provider/openai_api.py
@@ -233,7 +233,7 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
 
             padding_size = 20 if max_token_count > 20 else 0
             text_windows = self.split_texts(text, window_size=max_token_count - padding_size)
-            part_max_words = min(int(max_words / len(text_windows)) + 1, 60)
+            part_max_words = min(int(max_words / len(text_windows)) + 1, 100)
             summaries = []
             for ws in text_windows:
                 response = await self._get_summary(text=ws, max_words=part_max_words, keep_language=keep_language)
@@ -243,6 +243,7 @@ class OpenAIGPTAPI(BaseGPTAPI, RateLimiter):
 
             # Merged and retry
             text = "\n".join(summaries)
+            text_length = len(text)
 
             max_count -= 1  # safeguard
         raise openai.error.InvalidRequestError("text too long")