diff --git a/nodes/model_optimization_nodes.py b/nodes/model_optimization_nodes.py
index 831a299..013bc4f 100644
--- a/nodes/model_optimization_nodes.py
+++ b/nodes/model_optimization_nodes.py
@@ -17,7 +17,7 @@ except ImportError:
     v3_available = False
     logging.warning("ComfyUI v3 node API not available, please update ComfyUI to access latest v3 nodes.")
 
-sageattn_modes = ["disabled", "auto", "sageattn_qk_int8_pv_fp16_cuda", "sageattn_qk_int8_pv_fp16_triton", "sageattn_qk_int8_pv_fp8_cuda", "sageattn_qk_int8_pv_fp8_cuda++"]
+sageattn_modes = ["disabled", "auto", "sageattn_qk_int8_pv_fp16_cuda", "sageattn_qk_int8_pv_fp16_triton", "sageattn_qk_int8_pv_fp8_cuda", "sageattn_qk_int8_pv_fp8_cuda++", "sageattn3", "sageattn3_per_block_mean"]
 
 _initialized = False
 _original_functions = {}
@@ -118,6 +118,15 @@ class BaseLoaderKJ:
                     def func(q, k, v, is_causal=False, attn_mask=None, tensor_layout="NHD"):
                         return sageattn_qk_int8_pv_fp8_cuda(q, k, v, is_causal=is_causal, attn_mask=attn_mask, pv_accum_dtype="fp32+fp16", tensor_layout=tensor_layout)
                     return func
+                elif "sageattn3" in sage_attention:
+                    from sageattn3 import sageattn3_blackwell
+                    if sage_attention == "sageattn3_per_block_mean":
+                        def func(q, k, v, is_causal=False, attn_mask=None):
+                            return sageattn3_blackwell(q, k, v, is_causal=is_causal, attn_mask=attn_mask, per_block_mean=True)
+                    else:
+                        def func(q, k, v, is_causal=False, attn_mask=None):
+                            return sageattn3_blackwell(q, k, v, is_causal=is_causal, attn_mask=attn_mask, per_block_mean=False)
+                    return func
 
             sage_func = set_sage_func(sage_attention)