diff --git a/src/Responses/Chat/CreateResponseToolCall.php b/src/Responses/Chat/CreateResponseToolCall.php
index b14a0776..64ba656f 100644
--- a/src/Responses/Chat/CreateResponseToolCall.php
+++ b/src/Responses/Chat/CreateResponseToolCall.php
@@ -10,10 +10,11 @@ private function __construct(
         public readonly string $id,
         public readonly string $type,
         public readonly CreateResponseToolCallFunction $function,
+        public readonly array $extraContent
     ) {}
 
     /**
-     * @param  array{id: string, type: string, function: array{name: string, arguments: string}}  $attributes
+     * @param  array{id: string, type: string, function: array{name: string, arguments: string}, extra_content: array|null}  $attributes
      */
     public static function from(array $attributes): self
     {
@@ -21,11 +22,12 @@ public static function from(array $attributes): self
             $attributes['id'],
             $attributes['type'],
             CreateResponseToolCallFunction::from($attributes['function']),
+            $attributes['extra_content'] ?? []
         );
     }
 
     /**
-     * @return array{id: string, type: string, function: array{name: string, arguments: string}}
+     * @return array{id: string, type: string, function: array{name: string, arguments: string}, extra_content: array}
      */
     public function toArray(): array
     {
@@ -33,6 +35,7 @@ public function toArray(): array
             'id' => $this->id,
             'type' => $this->type,
             'function' => $this->function->toArray(),
+            'extra_content' => $this->extraContent,
         ];
     }
 }
diff --git a/src/Transporters/HttpTransporter.php b/src/Transporters/HttpTransporter.php
index 0b1d8af6..701f458f 100644
--- a/src/Transporters/HttpTransporter.php
+++ b/src/Transporters/HttpTransporter.php
@@ -175,8 +175,8 @@ private function throwIfJsonError(ResponseInterface $response, string|ResponseIn
             /** @var array{error?: string|array{message: string|array<int, string>, type: string, code: string}} $data */
             $data = json_decode($contents, true, flags: JSON_THROW_ON_ERROR);
 
-            if (isset($data['error'])) {
-                throw new ErrorException($data['error'], $response);
+            if (isset($data['error']) || isset($data[0]['error'])) {
+                throw new ErrorException($data['error'] ?? $data[0]['error'], $response);
             }
         } catch (JsonException $jsonException) {
             throw new UnserializableResponse($jsonException, $response);