diff --git a/sexp_effects/primitive_libs/streaming.py b/sexp_effects/primitive_libs/streaming.py
index 7ad2793..647fa3b 100644
--- a/sexp_effects/primitive_libs/streaming.py
+++ b/sexp_effects/primitive_libs/streaming.py
@@ -25,7 +25,8 @@ except ImportError:
     CUPY_AVAILABLE = False
 
 # GPU persistence mode - output CuPy arrays instead of numpy
-GPU_PERSIST = os.environ.get("STREAMING_GPU_PERSIST", "1") == "1" and CUPY_AVAILABLE
+# Disabled by default until all primitives support GPU frames
+GPU_PERSIST = os.environ.get("STREAMING_GPU_PERSIST", "0") == "1" and CUPY_AVAILABLE
 
 # Check for hardware decode support (cached)
 _HWDEC_AVAILABLE = None