diff --git a/src/Contracts/Resources/ThreadsMessagesContract.php b/src/Contracts/Resources/ThreadsMessagesContract.php
index 8e632cdd..bbb6a482 100644
--- a/src/Contracts/Resources/ThreadsMessagesContract.php
+++ b/src/Contracts/Resources/ThreadsMessagesContract.php
@@ -51,4 +51,11 @@ public function delete(string $threadId, string $messageId): ThreadMessageDelete
      * @param  array<string, mixed>  $parameters
      */
     public function list(string $threadId, array $parameters = []): ThreadMessageListResponse;
+
+    /**
+     * Manage files attached to a thred message.
+     *
+     * @see https://platform.openai.com/docs/api-reference/messages/file-object
+     */
+    public function files(): ThreadsMessagesFilesContract;
 }
diff --git a/src/Contracts/Resources/ThreadsMessagesFilesContract.php b/src/Contracts/Resources/ThreadsMessagesFilesContract.php
new file mode 100644
index 00000000..c8218c35
--- /dev/null
+++ b/src/Contracts/Resources/ThreadsMessagesFilesContract.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace OpenAI\Contracts\Resources;
+
+use OpenAI\Responses\Threads\Messages\Files\ThreadMessageFileListResponse;
+use OpenAI\Responses\Threads\Messages\Files\ThreadMessageFileResponse;
+use OpenAI\Responses\Threads\Messages\ThreadMessageDeleteResponse;
+use OpenAI\Responses\Threads\Messages\ThreadMessageListResponse;
+use OpenAI\Responses\Threads\Messages\ThreadMessageResponse;
+
+interface ThreadsMessagesFilesContract
+{
+    /**
+     * Retrieves a message file.
+     *
+     * @see https://platform.openai.com/docs/api-reference/messages/getMessageFile
+     */
+    public function retrieve(string $threadId, string $messageId, string $fileId): ThreadMessageFileResponse;
+
+    /**
+     * Returns a list of message files.
+     *
+     * @see https://platform.openai.com/docs/api-reference/messages/listMessageFiles
+     *
+     * @param  array<string, mixed>  $parameters
+     */
+    public function list(string $threadId, string $messageId, array $parameters = []): ThreadMessageFileListResponse;
+}
diff --git a/src/Resources/ThreadsMessages.php b/src/Resources/ThreadsMessages.php
index 2b92d500..b815695c 100644
--- a/src/Resources/ThreadsMessages.php
+++ b/src/Resources/ThreadsMessages.php
@@ -7,6 +7,7 @@
 use OpenAI\Contracts\Resources\ListAssistantsResponse;
 use OpenAI\Contracts\Resources\ThreadsContract;
 use OpenAI\Contracts\Resources\ThreadsMessagesContract;
+use OpenAI\Contracts\Resources\ThreadsMessagesFilesContract;
 use OpenAI\Responses\Threads\Messages\ThreadMessageDeleteResponse;
 use OpenAI\Responses\Threads\Messages\ThreadMessageListResponse;
 use OpenAI\Responses\Threads\Messages\ThreadMessageResponse;
@@ -100,4 +101,14 @@ public function list(string $threadId, array $parameters = []): ThreadMessageLis
 
         return ThreadMessageListResponse::from($response->data(), $response->meta());
     }
+
+    /**
+     * Manage files attached to a thred message.
+     *
+     * @see https://platform.openai.com/docs/api-reference/messages/file-object
+     */
+    public function files(): ThreadsMessagesFilesContract
+    {
+        return new ThreadsMessagesFiles($this->transporter);
+    }
 }
diff --git a/src/Resources/ThreadsMessagesFiles.php b/src/Resources/ThreadsMessagesFiles.php
new file mode 100644
index 00000000..7d593e52
--- /dev/null
+++ b/src/Resources/ThreadsMessagesFiles.php
@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenAI\Resources;
+
+use OpenAI\Contracts\Resources\ListAssistantsResponse;
+use OpenAI\Contracts\Resources\ThreadsMessagesContract;
+use OpenAI\Contracts\Resources\ThreadsMessagesFilesContract;
+use OpenAI\Responses\Threads\Messages\Files\ThreadMessageFileListResponse;
+use OpenAI\Responses\Threads\Messages\Files\ThreadMessageFileResponse;
+use OpenAI\Responses\Threads\Messages\ThreadMessageDeleteResponse;
+use OpenAI\Responses\Threads\Messages\ThreadMessageListResponse;
+use OpenAI\Responses\Threads\Messages\ThreadMessageResponse;
+use OpenAI\Responses\Threads\ThreadDeleteResponse;
+use OpenAI\ValueObjects\Transporter\Payload;
+use OpenAI\ValueObjects\Transporter\Response;
+
+final class ThreadsMessagesFiles implements ThreadsMessagesFilesContract
+{
+    use Concerns\Transportable;
+
+    /**
+     * Retrieves a message file.
+     *
+     * @see https://platform.openai.com/docs/api-reference/messages/getMessageFile
+     */
+    public function retrieve(string $threadId, string $messageId, string $fileId): ThreadMessageFileResponse
+    {
+        $payload = Payload::retrieve("threads/$threadId/messages/$messageId/files", $fileId);
+
+        /** @var Response<array{created: int, data: array<int, array{url?: string, b64_json?: string}>}> $response */
+        $response = $this->transporter->requestObject($payload);
+
+        return ThreadMessageFileResponse::from($response->data(), $response->meta());
+    }
+
+    /**
+     * Returns a list of message files.
+     *
+     * @see https://platform.openai.com/docs/api-reference/messages/listMessageFiles
+     *
+     * @param  array<string, mixed>  $parameters
+     */
+    public function list(string $threadId, string $messageId, array $parameters = []): ThreadMessageFileListResponse
+    {
+        $payload = Payload::list("threads/$threadId/messages/$messageId/files", $parameters);
+
+        /** @var Response<array{data: array<int, array{id: string, object: string, created: int, data: array<int, array{url?: string, b64_json?: string}>}>}> $response */
+        $response = $this->transporter->requestObject($payload);
+
+        return ThreadMessageFileListResponse::from($response->data(), $response->meta());
+    }
+}
diff --git a/src/Responses/Threads/Messages/Files/ThreadMessageFileListResponse.php b/src/Responses/Threads/Messages/Files/ThreadMessageFileListResponse.php
new file mode 100644
index 00000000..5a062af2
--- /dev/null
+++ b/src/Responses/Threads/Messages/Files/ThreadMessageFileListResponse.php
@@ -0,0 +1,78 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenAI\Responses\Threads\Messages\Files;
+
+use OpenAI\Contracts\ResponseContract;
+use OpenAI\Contracts\ResponseHasMetaInformationContract;
+use OpenAI\Responses\Concerns\ArrayAccessible;
+use OpenAI\Responses\Concerns\HasMetaInformation;
+use OpenAI\Responses\Meta\MetaInformation;
+use OpenAI\Testing\Responses\Concerns\Fakeable;
+
+/**
+ * @implements ResponseContract<array{object: string, data: array<int, array{id: string, object: string, model: string, created_at: int, finished_at: ?int, fine_tuned_model: ?string, hyperparameters: array{n_epochs: int|string}, organization_id: string, result_files: array<int, string>, status: string, validation_file: ?string, training_file: string, trained_tokens: ?int}>, has_more: bool}>
+ */
+final class ThreadMessageFileListResponse implements ResponseContract, ResponseHasMetaInformationContract
+{
+    /**
+     * @use ArrayAccessible<array{object: string, data: array<int, array{id: string, object: string, model: string, created_at: int, finished_at: ?int, fine_tuned_model: ?string, hyperparameters: array{n_epochs: int|string}, organization_id: string, result_files: array<int, string>, status: string, validation_file: ?string, training_file: string, trained_tokens: ?int}>, has_more: bool}>
+     */
+    use ArrayAccessible;
+
+    use Fakeable;
+    use HasMetaInformation;
+
+    /**
+     * @param  array<int, ThreadMessageFileResponse>  $data
+     */
+    private function __construct(
+        public readonly string $object,
+        public readonly array $data,
+        public readonly ?string $firstId,
+        public readonly ?string $lastId,
+        public readonly bool $hasMore,
+        private readonly MetaInformation $meta,
+    ) {
+    }
+
+    /**
+     * Acts as static factory, and returns a new Response instance.
+     *
+     * @param  array{object: string, data: array<int, array{id: string, object: string, model: string, created_at: int, finished_at: ?int, fine_tuned_model: ?string, hyperparameters: array{n_epochs: int|string}, organization_id: string, result_files: array<int, string>, status: string, validation_file: ?string, training_file: string, trained_tokens: ?int}>, has_more: bool}  $attributes
+     */
+    public static function from(array $attributes, MetaInformation $meta): self
+    {
+        $data = array_map(fn (array $result): ThreadMessageFileResponse => ThreadMessageFileResponse::from(
+            $result,
+            $meta,
+        ), $attributes['data']);
+
+        return new self(
+            $attributes['object'],
+            $data,
+            $attributes['first_id'],
+            $attributes['last_id'],
+            $attributes['has_more'],
+            $meta,
+        );
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function toArray(): array
+    {
+        return [
+            'object' => $this->object,
+            'data' => array_map(
+                static fn (ThreadMessageFileResponse $response): array => $response->toArray(),
+                $this->data,
+            ),
+            'first_id' => $this->firstId,
+            'last_id' => $this->lastId,
+            'has_more' => $this->hasMore,
+        ];
+    }
+}
diff --git a/src/Responses/Threads/Messages/Files/ThreadMessageFileResponse.php b/src/Responses/Threads/Messages/Files/ThreadMessageFileResponse.php
new file mode 100644
index 00000000..4d69f871
--- /dev/null
+++ b/src/Responses/Threads/Messages/Files/ThreadMessageFileResponse.php
@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OpenAI\Responses\Threads\Messages\Files;
+
+use OpenAI\Contracts\ResponseContract;
+use OpenAI\Contracts\ResponseHasMetaInformationContract;
+use OpenAI\Responses\Concerns\ArrayAccessible;
+use OpenAI\Responses\Concerns\HasMetaInformation;
+use OpenAI\Responses\Meta\MetaInformation;
+use OpenAI\Testing\Responses\Concerns\Fakeable;
+
+/**
+ * @implements ResponseContract<array{task: ?string, language: ?string, duration: ?float, segments: array<int, array{id: int, seek: int, start: float, end: float, text: string, tokens: array<int, int>, temperature: float, avg_logprob: float, compression_ratio: float, no_speech_prob: float, transient: bool}>, text: string}>
+ */
+final class ThreadMessageFileResponse implements ResponseContract, ResponseHasMetaInformationContract
+{
+    /**
+     * @use ArrayAccessible<array{task: ?string, language: ?string, duration: ?float, segments: array<int, array{id: int, seek: int, start: float, end: float, text: string, tokens: array<int, int>, temperature: float, avg_logprob: float, compression_ratio: float, no_speech_prob: float, transient: bool}>, text: string}>
+     */
+    use ArrayAccessible;
+
+    use Fakeable;
+    use HasMetaInformation;
+
+    /**
+     * @param  array<int, ThreadMessageResponseContentTextObject|ThreadMessageResponseContentImageFileObject>  $content
+     */
+    private function __construct(
+        public string                    $id,
+        public string                    $object,
+        public int                   $createdAt,
+        public string                    $messageId,
+        private readonly MetaInformation $meta,
+    )
+    {
+    }
+
+    /**
+     * Acts as static factory, and returns a new Response instance.
+     *
+     * @param  array{task: ?string, language: ?string, duration: ?float, segments: array<int, array{id: int, seek: int, start: float, end: float, text: string, tokens: array<int, int>, temperature: float, avg_logprob: float, compression_ratio: float, no_speech_prob: float, transient: bool}>, text: string}|string  $attributes
+     */
+    public static function from(array|string $attributes, MetaInformation $meta): self
+    {
+       return new self(
+            $attributes['id'],
+            $attributes['object'],
+            $attributes['created_at'],
+            $attributes['message_id'],
+            $meta,
+        );
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function toArray(): array
+    {
+        return [
+            'id' => $this->id,
+            'object' => $this->object,
+            'created_at' => $this->createdAt,
+            'message_id' => $this->messageId,
+        ];
+    }
+}