diff --git a/ultralytics/yolo/v8/models/yolov8l.yaml b/ultralytics/yolo/v8/models/yolov8l.yaml
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+++ b/ultralytics/yolo/v8/models/yolov8l.yaml
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+# YOLOv5 🚀 by Ultralytics, GPL-3.0 license
+
+# Parameters
+nc: 80  # number of classes
+depth_multiple: 1.00  # model depth multiple
+width_multiple: 1.00  # layer channel multiple
+
+# YOLOv8.0l backbone
+backbone:
+  # [from, number, module, args]
+  [[-1, 1, Conv, [64, 3, 2]],  # 0-P1/2
+   [-1, 1, Conv, [128, 3, 2]],  # 1-P2/4
+   [-1, 3, C2f, [128, True]],
+   [-1, 1, Conv, [256, 3, 2]],  # 3-P3/8
+   [-1, 6, C2f, [256, True]],
+   [-1, 1, Conv, [512, 3, 2]],  # 5-P4/16
+   [-1, 6, C2f, [512, True]],
+   [-1, 1, Conv, [512, 3, 2]],  # 7-P5/32
+   [-1, 3, C2f, [512, True]],
+   [-1, 1, SPPF, [512, 5]],  # 9
+  ]
+
+# YOLOv8.0l head
+head:
+  [[-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 6], 1, Concat, [1]],  # cat backbone P4
+   [-1, 3, C2f, [512]],  # 13
+
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 4], 1, Concat, [1]],  # cat backbone P3
+   [-1, 3, C2f, [256]],  # 17 (P3/8-small)
+
+   [-1, 1, Conv, [256, 3, 2]],
+   [[-1, 12], 1, Concat, [1]],  # cat head P4
+   [-1, 3, C2f, [512]],  # 20 (P4/16-medium)
+
+   [-1, 1, Conv, [512, 3, 2]],
+   [[-1, 9], 1, Concat, [1]],  # cat head P5
+   [-1, 3, C2f, [512]],  # 23 (P5/32-large)
+
+   [[15, 18, 21], 1, Detect, [nc]],  # Detect(P3, P4, P5)
+  ]
diff --git a/ultralytics/yolo/v8/models/yolov8x.yaml b/ultralytics/yolo/v8/models/yolov8x.yaml
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+++ b/ultralytics/yolo/v8/models/yolov8x.yaml
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+# YOLOv5 🚀 by Ultralytics, GPL-3.0 license
+
+# Parameters
+nc: 80  # number of classes
+depth_multiple: 1.00  # model depth multiple
+width_multiple: 1.25  # layer channel multiple
+
+# YOLOv8.0x backbone
+backbone:
+  # [from, number, module, args]
+  [[-1, 1, Conv, [64, 3, 2]],  # 0-P1/2
+   [-1, 1, Conv, [128, 3, 2]],  # 1-P2/4
+   [-1, 3, C2f, [128, True]],
+   [-1, 1, Conv, [256, 3, 2]],  # 3-P3/8
+   [-1, 6, C2f, [256, True]],
+   [-1, 1, Conv, [512, 3, 2]],  # 5-P4/16
+   [-1, 6, C2f, [512, True]],
+   [-1, 1, Conv, [512, 3, 2]],  # 7-P5/32
+   [-1, 3, C2f, [512, True]],
+   [-1, 1, SPPF, [512, 5]],  # 9
+  ]
+
+# YOLOv8.0x head
+head:
+  [[-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 6], 1, Concat, [1]],  # cat backbone P4
+   [-1, 3, C2f, [512]],  # 13
+
+   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
+   [[-1, 4], 1, Concat, [1]],  # cat backbone P3
+   [-1, 3, C2f, [256]],  # 17 (P3/8-small)
+
+   [-1, 1, Conv, [256, 3, 2]],
+   [[-1, 12], 1, Concat, [1]],  # cat head P4
+   [-1, 3, C2f, [512]],  # 20 (P4/16-medium)
+
+   [-1, 1, Conv, [512, 3, 2]],
+   [[-1, 9], 1, Concat, [1]],  # cat head P5
+   [-1, 3, C2f, [512]],  # 23 (P5/32-large)
+
+   [[15, 18, 21], 1, Detect, [nc]],  # Detect(P3, P4, P5)
+  ]