From 78bff4925e7104c8186c71727b3634a42d200886 Mon Sep 17 00:00:00 2001
From: NanoCode012 <nano@axolotl.ai>
Date: Tue, 8 Jul 2025 22:00:44 +0700
Subject: [PATCH] fix: set add_generation_prompt to False when apply chat
 template (#2859) [skip ci]

---
 src/axolotl/utils/collators/mm_chat.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/axolotl/utils/collators/mm_chat.py b/src/axolotl/utils/collators/mm_chat.py
index 75d72f8dc..8b9d728d5 100644
--- a/src/axolotl/utils/collators/mm_chat.py
+++ b/src/axolotl/utils/collators/mm_chat.py
@@ -50,7 +50,7 @@ class MultiModalChatDataCollator(DataCollatorMixin):
             # This method requires transformers>=4.49.0
             result = self.processing_strategy.processor.apply_chat_template(
                 example["messages"],
-                add_generation_prompt=True,
+                add_generation_prompt=False,
                 tokenize=True,
                 return_tensors="pt",
                 padding=True,