diff --git a/app/constants.ts b/app/constants.ts
index bd81d901..c3aef57a 100644
--- a/app/constants.ts
+++ b/app/constants.ts
@@ -43,6 +43,7 @@ export const MODELS = {
     label: 'claudeSonnet4',
     icon: AnthropicIcon
   },
+  gpt55: { name: 'GPT 5.5', label: 'gpt55', icon: OpenAIIcon },
   gpt52: { name: 'GPT 5.2', label: 'gpt52', icon: OpenAIIcon },
   gpt5Mini: { name: 'GPT 5 Mini', label: 'gpt5Mini', icon: OpenAIIcon },
   gemini: { name: 'Gemini', label: 'gemini', icon: GeminiIcon },
diff --git a/server/src/chat/gpt.ts b/server/src/chat/gpt.ts
index 83a37ce6..b64d8b3d 100644
--- a/server/src/chat/gpt.ts
+++ b/server/src/chat/gpt.ts
@@ -3,6 +3,7 @@ import asyncHandler from 'express-async-handler'
 
 export const gpt = asyncHandler(async (req: Request, res: Response) => {
   const models:any = {
+    gpt55: 'gpt-5.5',
     gpt52: 'gpt-5.2-2025-12-11',
     gpt5Mini: 'gpt-5-mini-2025-08-07'
   }