diff --git a/modules/openapi-generator/src/main/resources/ruby-client/api_client.mustache b/modules/openapi-generator/src/main/resources/ruby-client/api_client.mustache
index 192267217050..a4609a59fc27 100644
--- a/modules/openapi-generator/src/main/resources/ruby-client/api_client.mustache
+++ b/modules/openapi-generator/src/main/resources/ruby-client/api_client.mustache
@@ -135,9 +135,13 @@ module {{moduleName}}
           data.each { |k, v| hash[k] = convert_to_type(v, sub_type) }
         end
       else
-        # models (e.g. Pet) or oneOf
+        # models (e.g. Pet) or oneOf/anyOf
         klass = {{moduleName}}.const_get(return_type)
-        klass.respond_to?(:openapi_one_of) ? klass.build(data) : klass.build_from_hash(data)
+        if klass.respond_to?(:openapi_one_of) || klass.respond_to?(:openapi_any_of)
+          klass.build(data)
+        else
+          klass.build_from_hash(data)
+        end
       end
     end
 
diff --git a/samples/client/petstore/ruby-faraday/lib/petstore/api_client.rb b/samples/client/petstore/ruby-faraday/lib/petstore/api_client.rb
index 3d90fdccf324..af6ccb8a8e7f 100644
--- a/samples/client/petstore/ruby-faraday/lib/petstore/api_client.rb
+++ b/samples/client/petstore/ruby-faraday/lib/petstore/api_client.rb
@@ -322,9 +322,13 @@ def convert_to_type(data, return_type)
           data.each { |k, v| hash[k] = convert_to_type(v, sub_type) }
         end
       else
-        # models (e.g. Pet) or oneOf
+        # models (e.g. Pet) or oneOf/anyOf
         klass = Petstore.const_get(return_type)
-        klass.respond_to?(:openapi_one_of) ? klass.build(data) : klass.build_from_hash(data)
+        if klass.respond_to?(:openapi_one_of) || klass.respond_to?(:openapi_any_of)
+          klass.build(data)
+        else
+          klass.build_from_hash(data)
+        end
       end
     end
 
diff --git a/samples/client/petstore/ruby-httpx/lib/petstore/api_client.rb b/samples/client/petstore/ruby-httpx/lib/petstore/api_client.rb
index cbde64c86d06..1f1f61e97019 100644
--- a/samples/client/petstore/ruby-httpx/lib/petstore/api_client.rb
+++ b/samples/client/petstore/ruby-httpx/lib/petstore/api_client.rb
@@ -255,9 +255,13 @@ def convert_to_type(data, return_type)
           data.each { |k, v| hash[k] = convert_to_type(v, sub_type) }
         end
       else
-        # models (e.g. Pet) or oneOf
+        # models (e.g. Pet) or oneOf/anyOf
         klass = Petstore.const_get(return_type)
-        klass.respond_to?(:openapi_one_of) ? klass.build(data) : klass.build_from_hash(data)
+        if klass.respond_to?(:openapi_one_of) || klass.respond_to?(:openapi_any_of)
+          klass.build(data)
+        else
+          klass.build_from_hash(data)
+        end
       end
     end
 
diff --git a/samples/client/petstore/ruby/lib/petstore/api_client.rb b/samples/client/petstore/ruby/lib/petstore/api_client.rb
index 51eb197704e9..9df98b163c69 100644
--- a/samples/client/petstore/ruby/lib/petstore/api_client.rb
+++ b/samples/client/petstore/ruby/lib/petstore/api_client.rb
@@ -278,9 +278,13 @@ def convert_to_type(data, return_type)
           data.each { |k, v| hash[k] = convert_to_type(v, sub_type) }
         end
       else
-        # models (e.g. Pet) or oneOf
+        # models (e.g. Pet) or oneOf/anyOf
         klass = Petstore.const_get(return_type)
-        klass.respond_to?(:openapi_one_of) ? klass.build(data) : klass.build_from_hash(data)
+        if klass.respond_to?(:openapi_one_of) || klass.respond_to?(:openapi_any_of)
+          klass.build(data)
+        else
+          klass.build_from_hash(data)
+        end
       end
     end