check the model for modified property

src/vs/workbench/contrib/interactive/browser/interactiveEditorInput.ts

@@ -220,7 +220,7 @@ export class InteractiveEditorInput extends EditorInput implements ICompositeNot
 	}
 
 	override isModified() {
-		return true;
+		return this._editorModelReference?.isModified() ?? false;
 	}
 
 	override dispose() {

src/vs/workbench/contrib/notebook/common/notebookCommon.ts

@@ -797,6 +797,7 @@ export interface INotebookEditorModel extends IEditorModel {
 	readonly notebook: INotebookTextModel | undefined;
 	isResolved(): this is IResolvedNotebookEditorModel;
 	isDirty(): boolean;
+	isModified(): boolean;
 	isReadonly(): boolean | IMarkdownString;
 	isOrphaned(): boolean;
 	hasAssociatedFilePath(): boolean;

src/vs/workbench/contrib/notebook/common/notebookEditorModel.ts

@@ -85,6 +85,10 @@ export class SimpleNotebookEditorModel extends EditorModel implements INotebookE
 		return this._workingCopy?.isDirty() ?? false;
 	}
 
+	isModified(): boolean {
+		return this._workingCopy?.isModified() ?? false;
+	}
+
 	isOrphaned(): boolean {
 		return SimpleNotebookEditorModel._isStoredFileWorkingCopy(this._workingCopy) && this._workingCopy.hasState(StoredFileWorkingCopyState.ORPHAN);
 	}

src/vs/workbench/contrib/notebook/test/browser/testNotebookEditor.ts

@@ -134,6 +134,10 @@ export class NotebookEditorTestModel extends EditorModel implements INotebookEdi
 		return this._dirty;
 	}
 
+	isModified(): boolean {
+		return this._dirty;
+	}
+
 	getNotebook(): NotebookTextModel {
 		return this._notebook;
 	}