From 6e6932e45ae8c98a5489d50dd84b93f206d40c83 Mon Sep 17 00:00:00 2001
From: comfyanonymous <121283862+comfyanonymous@users.noreply.github.com>
Date: Sat, 1 Aug 2026 22:53:13 -0400
Subject: [PATCH] Disable gradients on diffusion models.

---
 comfy/model_base.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/comfy/model_base.py b/comfy/model_base.py
index ee6dc57a2..7c68c6eba 100644
--- a/comfy/model_base.py
+++ b/comfy/model_base.py
@@ -169,6 +169,7 @@ class BaseModel(torch.nn.Module):
             else:
                 operations = model_config.custom_operations
             self.diffusion_model = unet_model(**unet_config, device=device, operations=operations)
+            self.diffusion_model.requires_grad_(False)
             self.diffusion_model.eval()
             if comfy.model_management.force_channels_last():
                 self.diffusion_model.to(memory_format=torch.channels_last)