diff --git a/modules/ltx/ltx_ui.py b/modules/ltx/ltx_ui.py
index de72efda1..94bd857ef 100644
--- a/modules/ltx/ltx_ui.py
+++ b/modules/ltx/ltx_ui.py
@@ -31,13 +31,17 @@ def _model_change(model_name: str):
         )
     # 2.x refine runs fixed canonical schedules; refine_strength only feeds 0.9.x LTXConditionPipeline.
     refine_strength_interactive = caps.family == '0.9'
+    # Default Refine on for Dev 2.x T2V/I2V: Lightricks' production recipe is Stage 1 + 2x upsample
+    # + Stage 2 refine (auto_refine_upsample at ltx_process.py:179 couples the stages once Refine is on).
+    # Multi-condition variants are excluded for the same reason auto_refine_upsample excludes them.
+    refine_default = caps.supports_canonical_stage2 and not caps.supports_multi_condition
     return (
         gr.update(visible=caps.supports_input_media),
         gr.update(visible=caps.supports_multi_condition),
         gr.update(visible=True),
         gr.update(visible=True),
         gr.update(value=False),
-        gr.update(value=False),
+        gr.update(value=refine_default),
         gr.update(interactive=refine_strength_interactive),
         gr.update(value=caps.default_cfg),
         gr.update(value=caps.default_steps),