diff --git a/lib/src/core/base/chat/interfaces/create.dart b/lib/src/core/base/chat/interfaces/create.dart
index 59e168b8..26062d42 100644
--- a/lib/src/core/base/chat/interfaces/create.dart
+++ b/lib/src/core/base/chat/interfaces/create.dart
@@ -19,7 +19,7 @@ abstract class CreateInterface {
     Map<String, dynamic>? logitBias,
     String? user,
     http.Client? client,
-    Map<String, String>? responseFormat,
+    Map<String, dynamic>? responseFormat,
     int? seed,
   });
 
@@ -36,7 +36,7 @@ abstract class CreateInterface {
     double? presencePenalty,
     double? frequencyPenalty,
     Map<String, dynamic>? logitBias,
-    Map<String, String>? responseFormat,
+    Map<String, dynamic>? responseFormat,
     String? user,
     http.Client? client,
     int? seed,
@@ -57,7 +57,7 @@ abstract class CreateInterface {
     Map<String, dynamic>? logitBias,
     String? user,
     http.Client? client,
-    Map<String, String>? responseFormat,
+    Map<String, dynamic>? responseFormat,
     int? seed,
   });
 }
diff --git a/lib/src/instance/chat/chat.dart b/lib/src/instance/chat/chat.dart
index d9504e76..c6c4a198 100644
--- a/lib/src/instance/chat/chat.dart
+++ b/lib/src/instance/chat/chat.dart
@@ -80,7 +80,7 @@ interface class OpenAIChat implements OpenAIChatBase {
     double? frequencyPenalty,
     Map<String, dynamic>? logitBias,
     String? user,
-    Map<String, String>? responseFormat,
+    Map<String, dynamic>? responseFormat,
     int? seed,
     bool? logprobs,
     int? topLogprobs,
@@ -176,7 +176,7 @@ interface class OpenAIChat implements OpenAIChatBase {
     double? presencePenalty,
     double? frequencyPenalty,
     Map<String, dynamic>? logitBias,
-    Map<String, String>? responseFormat,
+    Map<String, dynamic>? responseFormat,
     int? seed,
     String? user,
     http.Client? client,
@@ -225,7 +225,7 @@ interface class OpenAIChat implements OpenAIChatBase {
     Map<String, dynamic>? logitBias,
     String? user,
     http.Client? client,
-    Map<String, String>? responseFormat,
+    Map<String, dynamic>? responseFormat,
     int? seed,
   }) {
     return OpenAINetworkingClient.postStream<OpenAIStreamChatCompletionModel>(