diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/IFileInstructService.cs b/src/Infrastructure/BotSharp.Abstraction/Files/IFileInstructService.cs
index e9ccb4ba..f35cdad5 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Files/IFileInstructService.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/IFileInstructService.cs
@@ -3,11 +3,11 @@ namespace BotSharp.Abstraction.Files;
 public interface IFileInstructService
 {
     #region Image
-    Task<string> ReadImages(string? provider, string? model, string text, IEnumerable<BotSharpFile> images);
+    Task<string> ReadImages(string? provider, string? model, string text, IEnumerable<InstructFileModel> images);
     Task<RoleDialogModel> GenerateImage(string? provider, string? model, string text);
-    Task<RoleDialogModel> VaryImage(string? provider, string? model, BotSharpFile image);
-    Task<RoleDialogModel> EditImage(string? provider, string? model, string text, BotSharpFile image);
-    Task<RoleDialogModel> EditImage(string? provider, string? model, string text, BotSharpFile image, BotSharpFile mask);
+    Task<RoleDialogModel> VaryImage(string? provider, string? model, InstructFileModel image);
+    Task<RoleDialogModel> EditImage(string? provider, string? model, string text, InstructFileModel image);
+    Task<RoleDialogModel> EditImage(string? provider, string? model, string text, InstructFileModel image, InstructFileModel mask);
     #endregion
 
     #region Pdf
@@ -17,11 +17,11 @@ public interface IFileInstructService
     /// <param name="prompt"></param>
     /// <param name="files">Pdf files</param>
     /// <returns></returns>
-    Task<string> ReadPdf(string? provider, string? model, string? modelId, string prompt, List<BotSharpFile> files);
+    Task<string> ReadPdf(string? provider, string? model, string? modelId, string prompt, List<InstructFileModel> files);
     #endregion
 
     #region Audio
-    Task<string> ReadAudio(string? provider, string? model, BotSharpFile audio);
+    Task<string> ReadAudio(string? provider, string? model, InstructFileModel audio);
     #endregion
 
     #region Select file
diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/IFileStorageService.cs b/src/Infrastructure/BotSharp.Abstraction/Files/IFileStorageService.cs
index a3e5a32d..6c98e21a 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Files/IFileStorageService.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/IFileStorageService.cs
@@ -16,7 +16,6 @@ public interface IFileStorageService
     string BuildDirectory(params string[] segments);
     #endregion
 
-
     #region Conversation
     /// <summary>
     /// Get the message file screenshots for specific content types, e.g., pdf
@@ -37,7 +36,7 @@ public interface IFileStorageService
     IEnumerable<MessageFileModel> GetMessageFiles(string conversationId, IEnumerable<string> messageIds, string source, IEnumerable<string>? contentTypes = null);
     string GetMessageFile(string conversationId, string messageId, string source, string index, string fileName);
     IEnumerable<MessageFileModel> GetMessagesWithFile(string conversationId, IEnumerable<string> messageIds);
-    bool SaveMessageFiles(string conversationId, string messageId, string source, List<BotSharpFile> files);
+    bool SaveMessageFiles(string conversationId, string messageId, string source, List<InputFileModel> files);
 
     /// <summary>
     /// Delete files under messages
@@ -54,8 +53,9 @@ public interface IFileStorageService
 
     #region User
     string GetUserAvatar();
-    bool SaveUserAvatar(BotSharpFile file);
+    bool SaveUserAvatar(InputFileModel file);
     #endregion
+
     #region Speech
     Task SaveSpeechFileAsync(string conversationId, string fileName, BinaryData data);
     Task<BinaryData> RetrieveSpeechFileAsync(string conversationId, string fileName);
diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/Models/BotSharpFile.cs b/src/Infrastructure/BotSharp.Abstraction/Files/Models/BotSharpFile.cs
index 11a11e46..46cba595 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Files/Models/BotSharpFile.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/Models/BotSharpFile.cs
@@ -1,7 +1,12 @@
 
 namespace BotSharp.Abstraction.Files.Models;
 
-public class BotSharpFile : FileBase
+public class BotSharpFile : FileInfo
 {
-    
+    /// <summary>
+    /// File data, e.g., "data:image/png;base64,aaaaaaaa"
+    /// </summary>
+    [JsonPropertyName("file_data")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? FileData { get; set; } = string.Empty;
 }
diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileBase.cs b/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileBase.cs
index 3483921a..f952e7f9 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileBase.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileBase.cs
@@ -2,20 +2,6 @@ namespace BotSharp.Abstraction.Files.Models;
 
 public class FileBase
 {
-    /// <summary>
-    /// External file url
-    /// </summary>
-    [JsonPropertyName("file_url")]
-    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public string? FileUrl { get; set; } = string.Empty;
-
-    /// <summary>
-    /// Internal file storage url
-    /// </summary>
-    [JsonPropertyName("file_storage_url")]
-    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public string? FileStorageUrl { get; set; } = string.Empty;
-
     /// <summary>
     /// File name without extension
     /// </summary>
@@ -29,18 +15,4 @@ public class FileBase
     [JsonPropertyName("file_data")]
     [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
     public string? FileData { get; set; } = string.Empty;
-
-    /// <summary>
-    /// File content type
-    /// </summary>
-    [JsonPropertyName("content_type")]
-    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public string? ContentType { get; set; } = string.Empty;
-
-    /// <summary>
-    /// File extension without dot
-    /// </summary>
-    [JsonPropertyName("file_extension")]
-    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-    public string? FileExtension { get; set; } = string.Empty;
 }
diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileInfo.cs b/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileInfo.cs
new file mode 100644
index 00000000..14c02f74
--- /dev/null
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/Models/FileInfo.cs
@@ -0,0 +1,38 @@
+namespace BotSharp.Abstraction.Files.Models;
+
+public class FileInfo
+{
+    /// <summary>
+    /// External file url
+    /// </summary>
+    [JsonPropertyName("file_url")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? FileUrl { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Internal file storage url
+    /// </summary>
+    [JsonPropertyName("file_storage_url")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? FileStorageUrl { get; set; } = string.Empty;
+
+    /// <summary>
+    /// File content type
+    /// </summary>
+    [JsonPropertyName("content_type")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? ContentType { get; set; } = string.Empty;
+
+    /// <summary>
+    /// File name without extension
+    /// </summary>
+    [JsonPropertyName("file_name")]
+    public string FileName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// File extension without dot
+    /// </summary>
+    [JsonPropertyName("file_extension")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? FileExtension { get; set; } = string.Empty;
+}
diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/Models/InputFileModel.cs b/src/Infrastructure/BotSharp.Abstraction/Files/Models/InputFileModel.cs
new file mode 100644
index 00000000..7eb350e3
--- /dev/null
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/Models/InputFileModel.cs
@@ -0,0 +1,16 @@
+namespace BotSharp.Abstraction.Files.Models;
+
+public class InputFileModel : FileBase
+{
+    /// <summary>
+    /// File name with extension
+    /// </summary>
+    [JsonPropertyName("file_name")]
+    public new string FileName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// File data => format: "data:image/png;base64,aaaaaaaa"
+    /// </summary>
+    [JsonPropertyName("file_data")]
+    public new string FileData { get; set; } = string.Empty;
+}
diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/Models/InstructFileModel.cs b/src/Infrastructure/BotSharp.Abstraction/Files/Models/InstructFileModel.cs
new file mode 100644
index 00000000..7eaddd5a
--- /dev/null
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/Models/InstructFileModel.cs
@@ -0,0 +1,18 @@
+namespace BotSharp.Abstraction.Files.Models;
+
+public class InstructFileModel : FileBase
+{
+    /// <summary>
+    /// File extension without dot
+    /// </summary>
+    [JsonPropertyName("file_extension")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? FileExtension { get; set; } = string.Empty;
+
+    /// <summary>
+    /// External file url
+    /// </summary>
+    [JsonPropertyName("file_url")]
+    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+    public string? FileUrl { get; set; } = string.Empty;
+}
diff --git a/src/Infrastructure/BotSharp.Abstraction/Files/Models/MessageFileModel.cs b/src/Infrastructure/BotSharp.Abstraction/Files/Models/MessageFileModel.cs
index 2a0128b6..59ada4f2 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Files/Models/MessageFileModel.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Files/Models/MessageFileModel.cs
@@ -1,6 +1,6 @@
 namespace BotSharp.Abstraction.Files.Models;
 
-public class MessageFileModel : FileBase
+public class MessageFileModel : FileInfo
 {
     [JsonPropertyName("message_id")]
     public string MessageId { get; set; }
diff --git a/src/Infrastructure/BotSharp.Abstraction/Models/AiModel.cs b/src/Infrastructure/BotSharp.Abstraction/Models/AiModel.cs
new file mode 100644
index 00000000..348eb457
--- /dev/null
+++ b/src/Infrastructure/BotSharp.Abstraction/Models/AiModel.cs
@@ -0,0 +1,10 @@
+namespace BotSharp.Abstraction.Models;
+
+public class AiModel
+{
+    public string Id { get; set; } = string.Empty;
+    public string Model { get; set; } = string.Empty;
+    public string Name { get; set; } = string.Empty;
+    public int MaxLength { get; set; }
+    public int TokenLimit { get; set; }
+}
diff --git a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Audio.cs b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Audio.cs
index f3f40f2c..30b6dbe3 100644
--- a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Audio.cs
+++ b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Audio.cs
@@ -4,7 +4,7 @@ namespace BotSharp.Core.Files.Services;
 
 public partial class FileInstructService
 {
-    public async Task<string> ReadAudio(string? provider, string? model, BotSharpFile audio)
+    public async Task<string> ReadAudio(string? provider, string? model, InstructFileModel audio)
     {
         var completion = CompletionProvider.GetSpeechToText(_services, provider: provider ?? "openai", model: model ?? "whisper-1");
         var audioBytes = await DownloadFile(audio);
@@ -12,7 +12,8 @@ public partial class FileInstructService
         stream.Write(audioBytes, 0, audioBytes.Length);
         stream.Position = 0;
 
-        var content = await completion.GenerateTextFromAudioAsync(stream, audio.FileName ?? string.Empty);
+        var fileName = $"{audio.FileName ?? "audio"}.{audio.FileExtension ?? "wav"}";
+        var content = await completion.GenerateTextFromAudioAsync(stream, fileName);
         stream.Close();
         return content;
     }
diff --git a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Image.cs b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Image.cs
index 244b5ac4..cd65c16a 100644
--- a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Image.cs
+++ b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Image.cs
@@ -4,7 +4,7 @@ namespace BotSharp.Core.Files.Services;
 
 public partial class FileInstructService
 {
-    public async Task<string> ReadImages(string? provider, string? model, string text, IEnumerable<BotSharpFile> images)
+    public async Task<string> ReadImages(string? provider, string? model, string text, IEnumerable<InstructFileModel> images)
     {
         var completion = CompletionProvider.GetChatCompletion(_services, provider: provider ?? "openai", model: model ?? "gpt-4o", multiModal: true);
         var message = await completion.GetChatCompletions(new Agent()
@@ -14,7 +14,7 @@ public partial class FileInstructService
         {
             new RoleDialogModel(AgentRole.User, text)
             {
-                Files = images?.ToList() ?? new List<BotSharpFile>()
+                Files = images?.Select(x => new BotSharpFile { FileUrl = x.FileUrl, FileData = x.FileData }).ToList() ?? new List<BotSharpFile>()
             }
         });
         return message.Content;
@@ -30,7 +30,7 @@ public partial class FileInstructService
         return message;
     }
 
-    public async Task<RoleDialogModel> VaryImage(string? provider, string? model, BotSharpFile image)
+    public async Task<RoleDialogModel> VaryImage(string? provider, string? model, InstructFileModel image)
     {
         if (string.IsNullOrWhiteSpace(image?.FileUrl) && string.IsNullOrWhiteSpace(image?.FileData))
         {
@@ -43,16 +43,17 @@ public partial class FileInstructService
         stream.Write(bytes, 0, bytes.Length);
         stream.Position = 0;
 
+        var fileName = $"{image.FileName ?? "image"}.{image.FileExtension ?? "png"}";
         var message = await completion.GetImageVariation(new Agent()
         {
             Id = Guid.Empty.ToString()
-        }, new RoleDialogModel(AgentRole.User, string.Empty), stream, image.FileName ?? string.Empty);
+        }, new RoleDialogModel(AgentRole.User, string.Empty), stream, fileName);
 
         stream.Close();
         return message;
     }
 
-    public async Task<RoleDialogModel> EditImage(string? provider, string? model, string text, BotSharpFile image)
+    public async Task<RoleDialogModel> EditImage(string? provider, string? model, string text, InstructFileModel image)
     {
         if (string.IsNullOrWhiteSpace(image?.FileUrl) && string.IsNullOrWhiteSpace(image?.FileData))
         {
@@ -65,16 +66,17 @@ public partial class FileInstructService
         stream.Write(bytes, 0, bytes.Length);
         stream.Position = 0;
 
+        var fileName = $"{image.FileName ?? "image"}.{image.FileExtension ?? "png"}";
         var message = await completion.GetImageEdits(new Agent()
         {
             Id = Guid.Empty.ToString()
-        }, new RoleDialogModel(AgentRole.User, text), stream, image.FileName ?? string.Empty);
+        }, new RoleDialogModel(AgentRole.User, text), stream, fileName);
 
         stream.Close();
         return message;
     }
 
-    public async Task<RoleDialogModel> EditImage(string? provider, string? model, string text, BotSharpFile image, BotSharpFile mask)
+    public async Task<RoleDialogModel> EditImage(string? provider, string? model, string text, InstructFileModel image, InstructFileModel mask)
     {
         if ((string.IsNullOrWhiteSpace(image?.FileUrl) && string.IsNullOrWhiteSpace(image?.FileData)) ||
             (string.IsNullOrWhiteSpace(mask?.FileUrl) && string.IsNullOrWhiteSpace(mask?.FileData)))
@@ -94,10 +96,12 @@ public partial class FileInstructService
         maskStream.Write(maskBytes, 0, maskBytes.Length);
         maskStream.Position = 0;
 
+        var imageName = $"{image.FileName ?? "image"}.{image.FileExtension ?? "png"}";
+        var maskName = $"{mask.FileName ?? "mask"}.{mask.FileExtension ?? "png"}";
         var message = await completion.GetImageEdits(new Agent()
         {
             Id = Guid.Empty.ToString()
-        }, new RoleDialogModel(AgentRole.User, text), imageStream, image.FileName ?? string.Empty, maskStream, mask.FileName ?? string.Empty);
+        }, new RoleDialogModel(AgentRole.User, text), imageStream, imageName, maskStream, maskName);
 
         imageStream.Close();
         maskStream.Close();
@@ -105,7 +109,7 @@ public partial class FileInstructService
     }
 
     #region Private methods
-    private async Task<byte[]> DownloadFile(BotSharpFile file)
+    private async Task<byte[]> DownloadFile(InstructFileModel file)
     {
         var bytes = new byte[0];
         if (!string.IsNullOrEmpty(file.FileUrl))
diff --git a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Pdf.cs b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Pdf.cs
index dd504fbf..e7228b13 100644
--- a/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Pdf.cs
+++ b/src/Infrastructure/BotSharp.Core/Files/Services/Instruct/FileInstructService.Pdf.cs
@@ -4,7 +4,7 @@ namespace BotSharp.Core.Files.Services;
 
 public partial class FileInstructService
 {
-    public async Task<string> ReadPdf(string? provider, string? model, string? modelId, string prompt, List<BotSharpFile> files)
+    public async Task<string> ReadPdf(string? provider, string? model, string? modelId, string prompt, List<InstructFileModel> files)
     {
         var content = string.Empty;
 
@@ -50,7 +50,7 @@ public partial class FileInstructService
     }
 
     #region Private methods
-    private async Task<IEnumerable<string>> DownloadFiles(string dir, List<BotSharpFile> files, string extension = "pdf")
+    private async Task<IEnumerable<string>> DownloadFiles(string dir, List<InstructFileModel> files, string extension = "pdf")
     {
         if (string.IsNullOrWhiteSpace(dir) || files.IsNullOrEmpty())
         {
diff --git a/src/Infrastructure/BotSharp.Core/Files/Services/Storage/LocalFileStorageService.Conversation.cs b/src/Infrastructure/BotSharp.Core/Files/Services/Storage/LocalFileStorageService.Conversation.cs
index 8c2ed831..248806ec 100644
--- a/src/Infrastructure/BotSharp.Core/Files/Services/Storage/LocalFileStorageService.Conversation.cs
+++ b/src/Infrastructure/BotSharp.Core/Files/Services/Storage/LocalFileStorageService.Conversation.cs
@@ -118,7 +118,7 @@ public partial class LocalFileStorageService
         return foundMsgs;
     }
 
-    public bool SaveMessageFiles(string conversationId, string messageId, string source, List<BotSharpFile> files)
+    public bool SaveMessageFiles(string conversationId, string messageId, string source, List<InputFileModel> files)
     {
         if (files.IsNullOrEmpty()) return false;
 
diff --git a/src/Infrastructure/BotSharp.Core/Files/Services/Storage/LocalFileStorageService.User.cs b/src/Infrastructure/BotSharp.Core/Files/Services/Storage/LocalFileStorageService.User.cs
index 43ff9eed..d1e962cd 100644
--- a/src/Infrastructure/BotSharp.Core/Files/Services/Storage/LocalFileStorageService.User.cs
+++ b/src/Infrastructure/BotSharp.Core/Files/Services/Storage/LocalFileStorageService.User.cs
@@ -16,7 +16,7 @@ public partial class LocalFileStorageService
         return found;
     }
 
-    public bool SaveUserAvatar(BotSharpFile file)
+    public bool SaveUserAvatar(InputFileModel file)
     {
         if (file == null || string.IsNullOrEmpty(file.FileData)) return false;
 
diff --git a/src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs b/src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs
index a7d4c449..16399334 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs
@@ -135,9 +135,14 @@ public class UserController : ControllerBase
 
     #region Avatar
     [HttpPost("/user/avatar")]
-    public bool UploadUserAvatar([FromBody] BotSharpFile file)
+    public bool UploadUserAvatar([FromBody] UserAvatarModel input)
     {
         var fileStorage = _services.GetRequiredService<IFileStorageService>();
+        var file = new InputFileModel
+        {
+            FileName = input.FileName,
+            FileData = input.FileData,
+        };
         return fileStorage.SaveUserAvatar(file);
     }
 
diff --git a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/InputMessageFiles.cs b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/InputMessageFiles.cs
index 5656f7ae..fdf088bb 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/InputMessageFiles.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Conversations/InputMessageFiles.cs
@@ -3,5 +3,5 @@ namespace BotSharp.OpenAPI.ViewModels.Conversations;
 public class InputMessageFiles
 {
     public List<MessageState> States { get; set; } = new();
-    public List<BotSharpFile> Files { get; set; } = new();
+    public List<InputFileModel> Files { get; set; } = new();
 }
diff --git a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Instructs/InstructBaseRequest.cs b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Instructs/InstructBaseRequest.cs
index 1b5d551d..45a1c8ab 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Instructs/InstructBaseRequest.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Instructs/InstructBaseRequest.cs
@@ -23,7 +23,7 @@ public class MultiModalRequest : InstructBaseRequest
     public string Text { get; set; } = string.Empty;
 
     [JsonPropertyName("files")]
-    public List<BotSharpFile> Files { get; set; } = new();
+    public List<InstructFileModel> Files { get; set; } = new();
 }
 
 public class ImageGenerationRequest : InstructBaseRequest
@@ -35,7 +35,7 @@ public class ImageGenerationRequest : InstructBaseRequest
 public class ImageVariationRequest : InstructBaseRequest
 {
     [JsonPropertyName("file")]
-    public BotSharpFile File { get; set; }
+    public InstructFileModel File { get; set; }
 }
 
 public class ImageEditRequest : InstructBaseRequest
@@ -44,7 +44,7 @@ public class ImageEditRequest : InstructBaseRequest
     public string Text { get; set; } = string.Empty;
 
     [JsonPropertyName("file")]
-    public BotSharpFile File { get; set; }
+    public InstructFileModel File { get; set; }
 }
 
 public class ImageMaskEditRequest : InstructBaseRequest
@@ -53,14 +53,14 @@ public class ImageMaskEditRequest : InstructBaseRequest
     public string Text { get; set; } = string.Empty;
 
     [JsonPropertyName("file")]
-    public BotSharpFile File { get; set; }
+    public InstructFileModel File { get; set; }
 
     [JsonPropertyName("mask")]
-    public BotSharpFile Mask { get; set; }
+    public InstructFileModel Mask { get; set; }
 }
 
 public class AudioCompletionRequest : InstructBaseRequest
 {
     [JsonPropertyName("file")]
-    public BotSharpFile File { get; set; }
+    public InstructFileModel File { get; set; }
 }
\ No newline at end of file
diff --git a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Users/UserAvatarModel.cs b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Users/UserAvatarModel.cs
new file mode 100644
index 00000000..0eab88e5
--- /dev/null
+++ b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Users/UserAvatarModel.cs
@@ -0,0 +1,18 @@
+using System.Text.Json.Serialization;
+
+namespace BotSharp.OpenAPI.ViewModels.Users;
+
+public class UserAvatarModel
+{
+    /// <summary>
+    /// File name with extension
+    /// </summary>
+    [JsonPropertyName("file_name")]
+    public string FileName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// File data, e.g., "data:image/png;base64,aaaaaaaa"
+    /// </summary>
+    [JsonPropertyName("file_data")]
+    public string FileData { get; set; } = string.Empty;
+}
diff --git a/src/Plugins/BotSharp.Plugin.FileHandler/Functions/EditImageFn.cs b/src/Plugins/BotSharp.Plugin.FileHandler/Functions/EditImageFn.cs
index 759f94b6..7a5d8e72 100644
--- a/src/Plugins/BotSharp.Plugin.FileHandler/Functions/EditImageFn.cs
+++ b/src/Plugins/BotSharp.Plugin.FileHandler/Functions/EditImageFn.cs
@@ -99,9 +99,9 @@ public class EditImageFn : IFunctionCallback
     {
         if (image == null) return;
 
-        var files = new List<BotSharpFile>()
+        var files = new List<InputFileModel>()
         {
-            new BotSharpFile
+            new InputFileModel
             {
                 FileName = $"{Guid.NewGuid()}.png",
                 FileData = $"data:{MediaTypeNames.Image.Png};base64,{image.ImageData}"
diff --git a/src/Plugins/BotSharp.Plugin.FileHandler/Functions/GenerateImageFn.cs b/src/Plugins/BotSharp.Plugin.FileHandler/Functions/GenerateImageFn.cs
index 4102ff7b..4c8fdf9e 100644
--- a/src/Plugins/BotSharp.Plugin.FileHandler/Functions/GenerateImageFn.cs
+++ b/src/Plugins/BotSharp.Plugin.FileHandler/Functions/GenerateImageFn.cs
@@ -77,7 +77,7 @@ public class GenerateImageFn : IFunctionCallback
     {
         if (images.IsNullOrEmpty()) return;
 
-        var files = images.Where(x => !string.IsNullOrEmpty(x?.ImageData)).Select(x => new BotSharpFile
+        var files = images.Where(x => !string.IsNullOrEmpty(x?.ImageData)).Select(x => new InputFileModel
         {
             FileName = $"{Guid.NewGuid()}.png",
             FileData = $"data:{MediaTypeNames.Image.Png};base64,{x.ImageData}"
diff --git a/src/Plugins/BotSharp.Plugin.TencentCos/Services/TencentCosService.Conversation.cs b/src/Plugins/BotSharp.Plugin.TencentCos/Services/TencentCosService.Conversation.cs
index 7e2462de..4c339f12 100644
--- a/src/Plugins/BotSharp.Plugin.TencentCos/Services/TencentCosService.Conversation.cs
+++ b/src/Plugins/BotSharp.Plugin.TencentCos/Services/TencentCosService.Conversation.cs
@@ -115,7 +115,7 @@ public partial class TencentCosService
         return foundMsgs;
     }
 
-    public bool SaveMessageFiles(string conversationId, string messageId, string source, List<BotSharpFile> files)
+    public bool SaveMessageFiles(string conversationId, string messageId, string source, List<InputFileModel> files)
     {
         if (files.IsNullOrEmpty()) return false;
 
diff --git a/src/Plugins/BotSharp.Plugin.TencentCos/Services/TencentCosService.User.cs b/src/Plugins/BotSharp.Plugin.TencentCos/Services/TencentCosService.User.cs
index de222c43..a2308539 100644
--- a/src/Plugins/BotSharp.Plugin.TencentCos/Services/TencentCosService.User.cs
+++ b/src/Plugins/BotSharp.Plugin.TencentCos/Services/TencentCosService.User.cs
@@ -16,7 +16,7 @@ public partial class TencentCosService
         return found;
     }
 
-    public bool SaveUserAvatar(BotSharpFile file)
+    public bool SaveUserAvatar(InputFileModel file)
     {
         if (file == null || string.IsNullOrEmpty(file.FileData)) return false;