diff --git a/timm/models/convnext.py b/timm/models/convnext.py
index a3b29953..38683056 100644
--- a/timm/models/convnext.py
+++ b/timm/models/convnext.py
@@ -789,130 +789,121 @@ default_cfgs = generate_default_cfgs({
 @register_model
 def convnext_atto(pretrained=False, **kwargs):
     # timm femto variant (NOTE: still tweaking depths, will vary between 3-4M param, current is 3.7M
-    model_args = dict(
-        depths=(2, 2, 6, 2), dims=(40, 80, 160, 320), conv_mlp=True, **kwargs)
-    model = _create_convnext('convnext_atto', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(2, 2, 6, 2), dims=(40, 80, 160, 320), conv_mlp=True)
+    model = _create_convnext('convnext_atto', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_atto_ols(pretrained=False, **kwargs):
     # timm femto variant with overlapping 3x3 conv stem, wider than non-ols femto above, current param count 3.7M
-    model_args = dict(
-        depths=(2, 2, 6, 2), dims=(40, 80, 160, 320), conv_mlp=True, stem_type='overlap_tiered', **kwargs)
-    model = _create_convnext('convnext_atto_ols', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(2, 2, 6, 2), dims=(40, 80, 160, 320), conv_mlp=True, stem_type='overlap_tiered')
+    model = _create_convnext('convnext_atto_ols', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_femto(pretrained=False, **kwargs):
     # timm femto variant
-    model_args = dict(
-        depths=(2, 2, 6, 2), dims=(48, 96, 192, 384), conv_mlp=True, **kwargs)
-    model = _create_convnext('convnext_femto', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(2, 2, 6, 2), dims=(48, 96, 192, 384), conv_mlp=True)
+    model = _create_convnext('convnext_femto', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_femto_ols(pretrained=False, **kwargs):
     # timm femto variant
-    model_args = dict(
-        depths=(2, 2, 6, 2), dims=(48, 96, 192, 384), conv_mlp=True, stem_type='overlap_tiered', **kwargs)
-    model = _create_convnext('convnext_femto_ols', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(2, 2, 6, 2), dims=(48, 96, 192, 384), conv_mlp=True, stem_type='overlap_tiered')
+    model = _create_convnext('convnext_femto_ols', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_pico(pretrained=False, **kwargs):
     # timm pico variant
-    model_args = dict(
-        depths=(2, 2, 6, 2), dims=(64, 128, 256, 512), conv_mlp=True, **kwargs)
-    model = _create_convnext('convnext_pico', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(2, 2, 6, 2), dims=(64, 128, 256, 512), conv_mlp=True)
+    model = _create_convnext('convnext_pico', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_pico_ols(pretrained=False, **kwargs):
     # timm nano variant with overlapping 3x3 conv stem
-    model_args = dict(
-        depths=(2, 2, 6, 2), dims=(64, 128, 256, 512), conv_mlp=True,  stem_type='overlap_tiered', **kwargs)
-    model = _create_convnext('convnext_pico_ols', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(2, 2, 6, 2), dims=(64, 128, 256, 512), conv_mlp=True,  stem_type='overlap_tiered')
+    model = _create_convnext('convnext_pico_ols', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_nano(pretrained=False, **kwargs):
     # timm nano variant with standard stem and head
-    model_args = dict(
-        depths=(2, 2, 8, 2), dims=(80, 160, 320, 640), conv_mlp=True, **kwargs)
-    model = _create_convnext('convnext_nano', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(2, 2, 8, 2), dims=(80, 160, 320, 640), conv_mlp=True)
+    model = _create_convnext('convnext_nano', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_nano_ols(pretrained=False, **kwargs):
     # experimental nano variant with overlapping conv stem
-    model_args = dict(
-        depths=(2, 2, 8, 2), dims=(80, 160, 320, 640), conv_mlp=True, stem_type='overlap', **kwargs)
-    model = _create_convnext('convnext_nano_ols', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(2, 2, 8, 2), dims=(80, 160, 320, 640), conv_mlp=True, stem_type='overlap')
+    model = _create_convnext('convnext_nano_ols', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_tiny_hnf(pretrained=False, **kwargs):
     # experimental tiny variant with norm before pooling in head (head norm first)
-    model_args = dict(
-        depths=(3, 3, 9, 3), dims=(96, 192, 384, 768), head_norm_first=True, conv_mlp=True, **kwargs)
-    model = _create_convnext('convnext_tiny_hnf', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(3, 3, 9, 3), dims=(96, 192, 384, 768), head_norm_first=True, conv_mlp=True)
+    model = _create_convnext('convnext_tiny_hnf', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_tiny(pretrained=False, **kwargs):
-    model_args = dict(depths=(3, 3, 9, 3), dims=(96, 192, 384, 768), **kwargs)
-    model = _create_convnext('convnext_tiny', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(3, 3, 9, 3), dims=(96, 192, 384, 768))
+    model = _create_convnext('convnext_tiny', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_small(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[96, 192, 384, 768], **kwargs)
-    model = _create_convnext('convnext_small', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 3, 27, 3], dims=[96, 192, 384, 768])
+    model = _create_convnext('convnext_small', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_base(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[128, 256, 512, 1024], **kwargs)
-    model = _create_convnext('convnext_base', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 3, 27, 3], dims=[128, 256, 512, 1024])
+    model = _create_convnext('convnext_base', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_large(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[192, 384, 768, 1536], **kwargs)
-    model = _create_convnext('convnext_large', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 3, 27, 3], dims=[192, 384, 768, 1536])
+    model = _create_convnext('convnext_large', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_large_mlp(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[192, 384, 768, 1536], head_hidden_size=1536, **kwargs)
-    model = _create_convnext('convnext_large_mlp', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 3, 27, 3], dims=[192, 384, 768, 1536], head_hidden_size=1536)
+    model = _create_convnext('convnext_large_mlp', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_xlarge(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[256, 512, 1024, 2048], **kwargs)
-    model = _create_convnext('convnext_xlarge', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 3, 27, 3], dims=[256, 512, 1024, 2048])
+    model = _create_convnext('convnext_xlarge', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnext_xxlarge(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 4, 30, 3], dims=[384, 768, 1536, 3072], **kwargs)
-    model = _create_convnext('convnext_xxlarge', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 4, 30, 3], dims=[384, 768, 1536, 3072], norm_eps=kwargs.pop('norm_eps', 1e-5))
+    model = _create_convnext('convnext_xxlarge', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
@@ -920,8 +911,8 @@ def convnext_xxlarge(pretrained=False, **kwargs):
 def convnextv2_atto(pretrained=False, **kwargs):
     # timm femto variant (NOTE: still tweaking depths, will vary between 3-4M param, current is 3.7M
     model_args = dict(
-        depths=(2, 2, 6, 2), dims=(40, 80, 160, 320), use_grn=True, ls_init_value=None, conv_mlp=True, **kwargs)
-    model = _create_convnext('convnextv2_atto', pretrained=pretrained, **model_args)
+        depths=(2, 2, 6, 2), dims=(40, 80, 160, 320), use_grn=True, ls_init_value=None, conv_mlp=True)
+    model = _create_convnext('convnextv2_atto', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
@@ -929,8 +920,8 @@ def convnextv2_atto(pretrained=False, **kwargs):
 def convnextv2_femto(pretrained=False, **kwargs):
     # timm femto variant
     model_args = dict(
-        depths=(2, 2, 6, 2), dims=(48, 96, 192, 384), use_grn=True, ls_init_value=None, conv_mlp=True, **kwargs)
-    model = _create_convnext('convnextv2_femto', pretrained=pretrained, **model_args)
+        depths=(2, 2, 6, 2), dims=(48, 96, 192, 384), use_grn=True, ls_init_value=None, conv_mlp=True)
+    model = _create_convnext('convnextv2_femto', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
@@ -938,8 +929,8 @@ def convnextv2_femto(pretrained=False, **kwargs):
 def convnextv2_pico(pretrained=False, **kwargs):
     # timm pico variant
     model_args = dict(
-        depths=(2, 2, 6, 2), dims=(64, 128, 256, 512), use_grn=True, ls_init_value=None, conv_mlp=True, **kwargs)
-    model = _create_convnext('convnextv2_pico', pretrained=pretrained, **model_args)
+        depths=(2, 2, 6, 2), dims=(64, 128, 256, 512), use_grn=True, ls_init_value=None, conv_mlp=True)
+    model = _create_convnext('convnextv2_pico', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
@@ -947,42 +938,41 @@ def convnextv2_pico(pretrained=False, **kwargs):
 def convnextv2_nano(pretrained=False, **kwargs):
     # timm nano variant with standard stem and head
     model_args = dict(
-        depths=(2, 2, 8, 2), dims=(80, 160, 320, 640), use_grn=True, ls_init_value=None, conv_mlp=True, **kwargs)
-    model = _create_convnext('convnextv2_nano', pretrained=pretrained, **model_args)
+        depths=(2, 2, 8, 2), dims=(80, 160, 320, 640), use_grn=True, ls_init_value=None, conv_mlp=True)
+    model = _create_convnext('convnextv2_nano', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnextv2_tiny(pretrained=False, **kwargs):
-    model_args = dict(
-        depths=(3, 3, 9, 3), dims=(96, 192, 384, 768), use_grn=True, ls_init_value=None, **kwargs)
-    model = _create_convnext('convnextv2_tiny', pretrained=pretrained, **model_args)
+    model_args = dict(depths=(3, 3, 9, 3), dims=(96, 192, 384, 768), use_grn=True, ls_init_value=None)
+    model = _create_convnext('convnextv2_tiny', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnextv2_small(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[96, 192, 384, 768], use_grn=True, ls_init_value=None, **kwargs)
-    model = _create_convnext('convnextv2_small', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 3, 27, 3], dims=[96, 192, 384, 768], use_grn=True, ls_init_value=None)
+    model = _create_convnext('convnextv2_small', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnextv2_base(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[128, 256, 512, 1024], use_grn=True, ls_init_value=None, **kwargs)
-    model = _create_convnext('convnextv2_base', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 3, 27, 3], dims=[128, 256, 512, 1024], use_grn=True, ls_init_value=None)
+    model = _create_convnext('convnextv2_base', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnextv2_large(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[192, 384, 768, 1536], use_grn=True, ls_init_value=None, **kwargs)
-    model = _create_convnext('convnextv2_large', pretrained=pretrained, **model_args)
+    model_args = dict(depths=[3, 3, 27, 3], dims=[192, 384, 768, 1536], use_grn=True, ls_init_value=None)
+    model = _create_convnext('convnextv2_large', pretrained=pretrained, **dict(model_args, **kwargs))
     return model
 
 
 @register_model
 def convnextv2_huge(pretrained=False, **kwargs):
-    model_args = dict(depths=[3, 3, 27, 3], dims=[352, 704, 1408, 2816], use_grn=True, ls_init_value=None, **kwargs)
-    model = _create_convnext('convnextv2_huge', pretrained=pretrained, **model_args)
-    return model
\ No newline at end of file
+    model_args = dict(depths=[3, 3, 27, 3], dims=[352, 704, 1408, 2816], use_grn=True, ls_init_value=None)
+    model = _create_convnext('convnextv2_huge', pretrained=pretrained, **dict(model_args, **kwargs))
+    return model