diff --git a/.changeset/famous-tomatoes-join.md b/.changeset/famous-tomatoes-join.md
new file mode 100644
index 00000000000..d132ee6b10c
--- /dev/null
+++ b/.changeset/famous-tomatoes-join.md
@@ -0,0 +1,5 @@
+---
+"kilo-code": patch
+---
+
+fix(ui): prevent TypeError when trimming input during model switching (#5614)
diff --git a/webview-ui/src/components/chat/ChatTextArea.tsx b/webview-ui/src/components/chat/ChatTextArea.tsx
index 86f0afc3f26..06fb9468e2d 100644
--- a/webview-ui/src/components/chat/ChatTextArea.tsx
+++ b/webview-ui/src/components/chat/ChatTextArea.tsx
@@ -451,7 +451,7 @@ export const ChatTextArea = forwardRef<HTMLTextAreaElement, ChatTextAreaProps>(
 		}, [selectedType, searchQuery])
 
 		const handleEnhancePrompt = useCallback(() => {
-			const trimmedInput = inputValue.trim()
+			const trimmedInput = inputValue?.trim() ?? ""
 
 			if (trimmedInput) {
 				setIsEnhancingPrompt(true)