diff --git a/src/corelib/itemmodels/qsortfilterproxymodel.cpp b/src/corelib/itemmodels/qsortfilterproxymodel.cpp
index a5284dbad4a..f6c6c89c8e6 100644
--- a/src/corelib/itemmodels/qsortfilterproxymodel.cpp
+++ b/src/corelib/itemmodels/qsortfilterproxymodel.cpp
@@ -3174,8 +3174,8 @@ void QSortFilterProxyModel::invalidateRowsFilter()
 bool QSortFilterProxyModel::lessThan(const QModelIndex &source_left, const QModelIndex &source_right) const
 {
     Q_D(const QSortFilterProxyModel);
-    QVariant l = (source_left.model() ? source_left.model()->data(source_left, d->sort_role) : QVariant());
-    QVariant r = (source_right.model() ? source_right.model()->data(source_right, d->sort_role) : QVariant());
+    const QVariant l = source_left.data(d->sort_role);
+    const QVariant r = source_right.data(d->sort_role);
     return QAbstractItemModelPrivate::isVariantLessThan(l, r, d->sort_casesensitivity, d->sort_localeaware);
 }
 
diff --git a/src/widgets/accessible/itemviews.cpp b/src/widgets/accessible/itemviews.cpp
index aa5f729820e..7b0dffcc497 100644
--- a/src/widgets/accessible/itemviews.cpp
+++ b/src/widgets/accessible/itemviews.cpp
@@ -1192,7 +1192,7 @@ QAccessible::State QAccessibleTableCell::state() const
     if (view->selectionModel()->currentIndex() == m_index)
         st.focused = true;
 
-    QVariant checkState = m_index.model()->data(m_index, Qt::CheckStateRole);
+    const QVariant checkState = m_index.data(Qt::CheckStateRole);
     if (checkState.toInt() == Qt::Checked)
         st.checked = true;
 
diff --git a/src/widgets/doc/snippets/qitemdelegate/spinbox-delegate.cpp b/src/widgets/doc/snippets/qitemdelegate/spinbox-delegate.cpp
index efe8a167337..5a73d551b57 100644
--- a/src/widgets/doc/snippets/qitemdelegate/spinbox-delegate.cpp
+++ b/src/widgets/doc/snippets/qitemdelegate/spinbox-delegate.cpp
@@ -49,7 +49,7 @@ QWidget *SpinBoxDelegate::createEditor(QWidget *parent,
 void SpinBoxDelegate::setEditorData(QWidget *editor,
                                     const QModelIndex &index) const
 {
-    int value = index.model()->data(index, Qt::EditRole).toInt();
+    int value = index.data(Qt::EditRole).toInt();
 
     QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
     spinBox->setValue(value);
diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index 1fe9a8d7be5..ce37bd87d07 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -111,7 +111,7 @@ QStyleOptionMenuItem QComboMenuDelegate::getStyleOption(const QStyleOptionViewIt
     else
         menuOption.menuItemType = QStyleOptionMenuItem::Normal;
 
-    QVariant variant = index.model()->data(index, Qt::DecorationRole);
+    const QVariant variant = index.data(Qt::DecorationRole);
     switch (variant.userType()) {
     case QMetaType::QIcon:
         menuOption.icon = qvariant_cast<QIcon>(variant);
@@ -129,7 +129,7 @@ QStyleOptionMenuItem QComboMenuDelegate::getStyleOption(const QStyleOptionViewIt
         menuOption.palette.setBrush(QPalette::All, QPalette::Window,
                                     qvariant_cast<QBrush>(index.data(Qt::BackgroundRole)));
     }
-    menuOption.text = index.model()->data(index, Qt::DisplayRole).toString().replace(u'&', "&&"_L1);
+    menuOption.text = index.data(Qt::DisplayRole).toString().replace(u'&', "&&"_L1);
     menuOption.reservedShortcutWidth = 0;
     menuOption.maxIconWidth =  option.decorationSize.width() + 4;
     menuOption.menuRect = option.rect;