diff --git a/src/openai/system_one.rs b/src/openai/system_one.rs
index f48e053..c72828c 100644
--- a/src/openai/system_one.rs
+++ b/src/openai/system_one.rs
@@ -219,27 +219,6 @@ pub struct Usage {
     pub output_tokens: u32,
 }
 
-/// Optional file input for multimodal models.
-///
-/// Represents an array of input files (images, audio, etc.) provided as data URLs.
-#[derive(Debug, Clone, Deserialize, Serialize)]
-pub struct FileInput {
-    /// Array of data URLs for input files.
-    ///
-    /// For images: data:image/...;base64,...
-    /// For audio: data:audio/...;base64,...
-    pub files: Vec<String>,
-}
-
-/// Alternative name for file input (alias for `files`).
-#[derive(Debug, Clone, Deserialize, Serialize)]
-pub struct ImageInput {
-    /// Array of image data URLs.
-    ///
-    /// Same format as `files` but specifically for images.
-    pub images: Vec<String>,
-}
-
 /// Complete request structure that includes optional file inputs.
 ///
 /// This is a convenience structure that combines the basic request with optional
@@ -250,6 +229,11 @@ pub struct MultimodalRequest {
     pub state: State,
 
     /// Optional file inputs (images, audio, etc.).
+    ///
+    /// Array of data URLs for input files.
+    ///
+    /// For images: data:image/...;base64,...
+    /// For audio: data:audio/...;base64,...
     #[serde(skip_serializing_if = "Option::is_none")]
     pub files: Option<Vec<String>>,