diff --git a/samples/client/echo_api/ruby-faraday/lib/openapi_client/api_client.rb b/samples/client/echo_api/ruby-faraday/lib/openapi_client/api_client.rb
index 797623b63d2..122d7db21b3 100644
--- a/samples/client/echo_api/ruby-faraday/lib/openapi_client/api_client.rb
+++ b/samples/client/echo_api/ruby-faraday/lib/openapi_client/api_client.rb
@@ -322,9 +322,13 @@ module OpenapiClient
           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 = OpenapiClient.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/echo_api/ruby-httpx/lib/openapi_client/api_client.rb b/samples/client/echo_api/ruby-httpx/lib/openapi_client/api_client.rb
index 6400151d862..2d4a56fd6d9 100644
--- a/samples/client/echo_api/ruby-httpx/lib/openapi_client/api_client.rb
+++ b/samples/client/echo_api/ruby-httpx/lib/openapi_client/api_client.rb
@@ -255,9 +255,13 @@ module OpenapiClient
           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 = OpenapiClient.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/echo_api/ruby-typhoeus/lib/openapi_client/api_client.rb b/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api_client.rb
index d086f323ef9..0c02f7222e3 100644
--- a/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api_client.rb
+++ b/samples/client/echo_api/ruby-typhoeus/lib/openapi_client/api_client.rb
@@ -278,9 +278,13 @@ module OpenapiClient
           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 = OpenapiClient.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-autoload/lib/petstore/api_client.rb b/samples/client/petstore/ruby-autoload/lib/petstore/api_client.rb
index 51eb197704e..9df98b163c6 100644
--- a/samples/client/petstore/ruby-autoload/lib/petstore/api_client.rb
+++ b/samples/client/petstore/ruby-autoload/lib/petstore/api_client.rb
@@ -278,9 +278,13 @@ module Petstore
           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/openapi3/client/extensions/x-auth-id-alias/ruby-client/lib/x_auth_id_alias/api_client.rb b/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/lib/x_auth_id_alias/api_client.rb
index cfbe708c502..dd3b7b4525d 100644
--- a/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/lib/x_auth_id_alias/api_client.rb
+++ b/samples/openapi3/client/extensions/x-auth-id-alias/ruby-client/lib/x_auth_id_alias/api_client.rb
@@ -278,9 +278,13 @@ module XAuthIDAlias
           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 = XAuthIDAlias.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/openapi3/client/features/dynamic-servers/ruby/lib/dynamic_servers/api_client.rb b/samples/openapi3/client/features/dynamic-servers/ruby/lib/dynamic_servers/api_client.rb
index 0b47eba28ae..3bcda5a1b79 100644
--- a/samples/openapi3/client/features/dynamic-servers/ruby/lib/dynamic_servers/api_client.rb
+++ b/samples/openapi3/client/features/dynamic-servers/ruby/lib/dynamic_servers/api_client.rb
@@ -277,9 +277,13 @@ module DynamicServers
           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 = DynamicServers.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/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/api_client.rb b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/api_client.rb
index 63bc2e14500..169b6897ed3 100644
--- a/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/api_client.rb
+++ b/samples/openapi3/client/features/generate-alias-as-model/ruby-client/lib/petstore/api_client.rb
@@ -277,9 +277,13 @@ module Petstore
           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