diff --git a/src/Responses/Chat/CreateResponseChoice.php b/src/Responses/Chat/CreateResponseChoice.php
index 21cac796..afba706a 100644
--- a/src/Responses/Chat/CreateResponseChoice.php
+++ b/src/Responses/Chat/CreateResponseChoice.php
@@ -19,7 +19,7 @@ private function __construct(
     public static function from(array $attributes): self
     {
         return new self(
-            $attributes['index'],
+            $attributes['index'] ?? 0,
             CreateResponseMessage::from($attributes['message']),
             $attributes['finish_reason'] ?? null,
         );
diff --git a/src/Responses/Chat/CreateStreamedResponseChoice.php b/src/Responses/Chat/CreateStreamedResponseChoice.php
index 6e4f7886..5017398e 100644
--- a/src/Responses/Chat/CreateStreamedResponseChoice.php
+++ b/src/Responses/Chat/CreateStreamedResponseChoice.php
@@ -19,7 +19,7 @@ private function __construct(
     public static function from(array $attributes): self
     {
         return new self(
-            $attributes['index'],
+            $attributes['index'] ?? 0,
             CreateStreamedResponseDelta::from($attributes['delta']),
             $attributes['finish_reason'] ?? null,
         );
diff --git a/src/Responses/Completions/CreateResponseChoice.php b/src/Responses/Completions/CreateResponseChoice.php
index 300c238b..aaba6918 100644
--- a/src/Responses/Completions/CreateResponseChoice.php
+++ b/src/Responses/Completions/CreateResponseChoice.php
@@ -21,7 +21,7 @@ public static function from(array $attributes): self
     {
         return new self(
             $attributes['text'],
-            $attributes['index'],
+            $attributes['index'] ?? 0,
             $attributes['logprobs'] ? CreateResponseChoiceLogprobs::from($attributes['logprobs']) : null,
             $attributes['finish_reason'],
         );