diff --git a/s08_context_compact/README.ja.md b/s08_context_compact/README.ja.md
index 07fa610a1..c7008bb92 100644
--- a/s08_context_compact/README.ja.md
+++ b/s08_context_compact/README.ja.md
@@ -236,7 +236,7 @@ def agent_loop(messages, active_request):
         except Exception as error:
             message = str(error).lower()
             too_long = ("prompt_too_long" in message
-                        or "too many tokens" in message)
+                        or "too many tokens / `prompt is too long`" in message)
             if too_long and reactive_retries < MAX_REACTIVE_RETRIES:
                 messages[:] = COMPACTOR.reactive_compact(
                     messages, active_request)
diff --git a/s08_context_compact/README.md b/s08_context_compact/README.md
index 924f88c85..e58c662f6 100644
--- a/s08_context_compact/README.md
+++ b/s08_context_compact/README.md
@@ -236,7 +236,7 @@ def agent_loop(messages, active_request):
         except Exception as error:
             message = str(error).lower()
             too_long = ("prompt_too_long" in message
-                        or "too many tokens" in message)
+                        or "too many tokens / `prompt is too long`" in message)
             if too_long and reactive_retries < MAX_REACTIVE_RETRIES:
                 messages[:] = COMPACTOR.reactive_compact(
                     messages, active_request)
diff --git a/s08_context_compact/README.zh.md b/s08_context_compact/README.zh.md
index 013130ab4..1022d0e9f 100644
--- a/s08_context_compact/README.zh.md
+++ b/s08_context_compact/README.zh.md
@@ -236,7 +236,7 @@ def agent_loop(messages, active_request):
         except Exception as error:
             message = str(error).lower()
             too_long = ("prompt_too_long" in message
-                        or "too many tokens" in message)
+                        or "too many tokens / `prompt is too long`" in message)
             if too_long and reactive_retries < MAX_REACTIVE_RETRIES:
                 messages[:] = COMPACTOR.reactive_compact(
                     messages, active_request)
diff --git a/s08_context_compact/code.py b/s08_context_compact/code.py
index 765c99995..cde711d24 100644
--- a/s08_context_compact/code.py
+++ b/s08_context_compact/code.py
@@ -536,7 +536,7 @@ def agent_loop(messages: list, active_request: str):
             reactive_retries = 0
         except Exception as error:
             too_long = any(text in str(error).lower()
-                           for text in ("prompt_too_long", "too many tokens"))
+                           for text in ("prompt_too_long", "too many tokens", "prompt is too long"))
             if too_long and reactive_retries < MAX_REACTIVE_RETRIES:
                 print("[reactive compact]")
                 messages[:] = COMPACTOR.reactive_compact(messages, active_request)