From 9f33c966c91c74a338830908bcef38da215372ef Mon Sep 17 00:00:00 2001
From: Classic298 <27028174+Classic298@users.noreply.github.com>
Date: Thu, 29 Oct 2026 20:51:10 +0100
Subject: [PATCH] feat: raise the default tool-call iteration limit per
 response to 1024 (#33384)

With native function calling, each model turn that calls tools counts as one iteration, and a single response was stopped with "Tool-call limit reached (256 iterations)." after 256 of them. The CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS environment variable now defaults to 1024, also when it is set empty or to something that is not a number, and the error shows the new number. A model stuck calling tools in a loop now runs up to 1024 iterations before it is stopped; setting the variable to 256 keeps the old limit, and -1 still means no limit.
---
 backend/open_webui/env.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/backend/open_webui/env.py b/backend/open_webui/env.py
index 0e2797c3af..14e882ca42 100644
--- a/backend/open_webui/env.py
+++ b/backend/open_webui/env.py
@@ -1128,16 +1128,16 @@ else:
 # The old CHAT_RESPONSE_MAX_TOOL_CALL_RETRIES name is accepted as a fallback.
 CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS = os.getenv(
     'CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS',
-    os.getenv('CHAT_RESPONSE_MAX_TOOL_CALL_RETRIES', '256'),
+    os.getenv('CHAT_RESPONSE_MAX_TOOL_CALL_RETRIES', '1024'),
 )
 
 if CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS == '':
-    CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS = 256
+    CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS = 1024
 else:
     try:
         CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS = int(CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS)
     except Exception:
-        CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS = 256
+        CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS = 1024
 
 # -1 means unlimited (no cap).
 if CHAT_RESPONSE_MAX_TOOL_CALL_ITERATIONS == -1: