diff --git a/modules/openapi-generator/src/main/resources/swift6/Models.mustache b/modules/openapi-generator/src/main/resources/swift6/Models.mustache
index 3998b58ae0b..48d37fa6247 100644
--- a/modules/openapi-generator/src/main/resources/swift6/Models.mustache
+++ b/modules/openapi-generator/src/main/resources/swift6/Models.mustache
@@ -90,7 +90,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
     case generalError(Error)
 }
 
-{{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}open{{/nonPublicApi}} class Response<T> {
+{{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} struct Response<T> {
     {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} let statusCode: Int
     {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} let header: [String: String]
     {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} let body: T
@@ -103,7 +103,7 @@ extension NullEncodable: Codable where Wrapped: Codable {
         self.bodyData = bodyData
     }
 
-    {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    {{#nonPublicApi}}internal{{/nonPublicApi}}{{^nonPublicApi}}public{{/nonPublicApi}} init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,7 +113,8 @@ extension NullEncodable: Codable where Wrapped: Codable {
         }
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
-}{{#useAlamofire}}
+}
+extension Response : Sendable where T : Sendable {}{{#useAlamofire}}
 
 /// Type-erased ResponseSerializer
 ///
diff --git a/samples/client/petstore/swift6/alamofireLibrary/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/alamofireLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
index 7381cd80bf9..9f52fd5393e 100644
--- a/samples/client/petstore/swift6/alamofireLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/alamofireLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -90,7 +90,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -103,7 +103,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -114,6 +114,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 /// Type-erased ResponseSerializer
 ///
diff --git a/samples/client/petstore/swift6/apiNonStaticMethod/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/apiNonStaticMethod/Sources/PetstoreClient/Infrastructure/Models.swift
index 7381cd80bf9..9f52fd5393e 100644
--- a/samples/client/petstore/swift6/apiNonStaticMethod/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/apiNonStaticMethod/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -90,7 +90,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -103,7 +103,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -114,6 +114,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 /// Type-erased ResponseSerializer
 ///
diff --git a/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/Models.swift b/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 6c41b1653e4..d6e95fffc23 100644
--- a/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ internal enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-internal class Response<T> {
+internal struct Response<T> {
     internal let statusCode: Int
     internal let header: [String: String]
     internal let body: T
@@ -102,7 +102,7 @@ internal class Response<T> {
         self.bodyData = bodyData
     }
 
-    internal convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    internal init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ internal class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 internal final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/Models.swift b/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()
diff --git a/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift b/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
index 15a76f8541f..f8e21e4d184 100644
--- a/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
+++ b/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/Models.swift
@@ -89,7 +89,7 @@ public enum DecodableRequestBuilderError: Error {
     case generalError(Error)
 }
 
-open class Response<T> {
+public struct Response<T> {
     public let statusCode: Int
     public let header: [String: String]
     public let body: T
@@ -102,7 +102,7 @@ open class Response<T> {
         self.bodyData = bodyData
     }
 
-    public convenience init(response: HTTPURLResponse, body: T, bodyData: Data?) {
+    public init(response: HTTPURLResponse, body: T, bodyData: Data?) {
         let rawHeader = response.allHeaderFields
         var responseHeader = [String: String]()
         for (key, value) in rawHeader {
@@ -113,6 +113,7 @@ open class Response<T> {
         self.init(statusCode: response.statusCode, header: responseHeader, body: body, bodyData: bodyData)
     }
 }
+extension Response : Sendable where T : Sendable {}
 
 public final class RequestTask: @unchecked Sendable {
     private let lock = NSRecursiveLock()