diff --git a/.changeset/rnd-11616-responses-selector-sync.md b/.changeset/rnd-11616-responses-selector-sync.md
new file mode 100644
index 000000000..ab563228f
--- /dev/null
+++ b/.changeset/rnd-11616-responses-selector-sync.md
@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Sync the API reference responses selector with the "Responses" collapsibles, and keep the selected response in sync across every operation on the page (like the code sample language selector). Selecting a status code now expands the matching response section and applies to all operations at once.
diff --git a/packages/react-openapi/src/OpenAPIDisclosureGroup.tsx b/packages/react-openapi/src/OpenAPIDisclosureGroup.tsx
index 71413da3e..c62783fb9 100644
--- a/packages/react-openapi/src/OpenAPIDisclosureGroup.tsx
+++ b/packages/react-openapi/src/OpenAPIDisclosureGroup.tsx
@@ -59,10 +59,11 @@ export function OpenAPIDisclosureGroup(props: DisclosureGroupProps & Props) {
         onExpandedChange,
     } = props;
 
-    const initialKeys =
-        expandedKeys || defaultExpandedKeys
-            ? new Set(expandedKeys || defaultExpandedKeys)
-            : undefined;
+    // When `expandedKeys` is provided, the group is controlled by the parent. Otherwise it owns
+    // its expanded state in a store keyed by `stateKey`.
+    const isControlled = expandedKeys !== undefined;
+
+    const initialKeys = defaultExpandedKeys ? new Set(defaultExpandedKeys) : undefined;
     const { expandedKeys: storeExpandedKeys, setExpandedKeys } = useDisclosureGroupStore(
         stateKey,
         initialKeys
@@ -70,9 +71,11 @@ export function OpenAPIDisclosureGroup(props: DisclosureGroupProps & Props) {
 
     const state = useDisclosureGroupState({
         ...props,
-        expandedKeys: storeExpandedKeys,
+        expandedKeys: isControlled ? expandedKeys : storeExpandedKeys,
         onExpandedChange: (keys) => {
-            setExpandedKeys(keys);
+            if (!isControlled) {
+                setExpandedKeys(keys);
+            }
             onExpandedChange?.(keys);
         },
     });
diff --git a/packages/react-openapi/src/OpenAPIResponseExample.tsx b/packages/react-openapi/src/OpenAPIResponseExample.tsx
index 945ace4f1..794817d06 100644
--- a/packages/react-openapi/src/OpenAPIResponseExample.tsx
+++ b/packages/react-openapi/src/OpenAPIResponseExample.tsx
@@ -93,13 +93,7 @@ export function OpenAPIResponseExample(props: {
         return null;
     }
 
-    return (
-        <OpenAPIResponseExampleContent
-            selectIcon={context.icons.chevronDown}
-            blockKey={context.blockKey}
-            items={tabs}
-        />
-    );
+    return <OpenAPIResponseExampleContent selectIcon={context.icons.chevronDown} items={tabs} />;
 }
 
 function OpenAPIResponse(props: {
diff --git a/packages/react-openapi/src/OpenAPIResponseExampleContent.tsx b/packages/react-openapi/src/OpenAPIResponseExampleContent.tsx
index 74c2f1142..58e4a7b92 100644
--- a/packages/react-openapi/src/OpenAPIResponseExampleContent.tsx
+++ b/packages/react-openapi/src/OpenAPIResponseExampleContent.tsx
@@ -14,42 +14,31 @@ type OpenAPIResponseExampleItem = OpenAPISelectItem & {
 /**
  * Get the state of the response examples select.
  */
-export function useResponseExamplesState(
-    blockKey: string | undefined,
-    initialKey: Key = 'default'
-) {
-    return useSelectState(getResponseExampleStateKey(blockKey), initialKey);
+export function useResponseExamplesState(initialKey: Key = 'default') {
+    return useSelectState(getResponseExampleStateKey(), initialKey);
 }
 
 export function OpenAPIResponseExampleContent(props: {
     items: OpenAPIResponseExampleItem[];
-    blockKey?: string;
     selectIcon?: React.ReactNode;
 }) {
-    const { blockKey, items, selectIcon } = props;
+    const { items, selectIcon } = props;
 
     return (
         <StaticSection
-            header={
-                <OpenAPIResponseExampleHeader
-                    selectIcon={selectIcon}
-                    blockKey={blockKey}
-                    items={items}
-                />
-            }
+            header={<OpenAPIResponseExampleHeader selectIcon={selectIcon} items={items} />}
             className="openapi-response-examples"
         >
-            <OpenAPIResponseExampleBody blockKey={blockKey} items={items} />
+            <OpenAPIResponseExampleBody items={items} />
         </StaticSection>
     );
 }
 
 function OpenAPIResponseExampleHeader(props: {
     items: OpenAPIResponseExampleItem[];
-    blockKey?: string;
     selectIcon?: React.ReactNode;
 }) {
-    const { items, blockKey, selectIcon } = props;
+    const { items, selectIcon } = props;
 
     if (items.length === 1) {
         const item = items[0];
@@ -69,7 +58,7 @@ function OpenAPIResponseExampleHeader(props: {
         <OpenAPISelect
             items={items}
             icon={selectIcon}
-            stateKey={getResponseExampleStateKey(blockKey)}
+            stateKey={getResponseExampleStateKey()}
             placement="bottom start"
         >
             {items.map((item) => (
@@ -103,10 +92,9 @@ function OpenAPIResponseExampleItem(props: {
 
 function OpenAPIResponseExampleBody(props: {
     items: OpenAPIResponseExampleItem[];
-    blockKey?: string;
 }) {
-    const { blockKey, items } = props;
-    const state = useResponseExamplesState(blockKey, items[0]?.key);
+    const { items } = props;
+    const state = useResponseExamplesState(items[0]?.key);
 
     const selectedItem = items.find((item) => item.key === state.key) ?? items[0];
 
@@ -118,8 +106,9 @@ function OpenAPIResponseExampleBody(props: {
 }
 
 /**
- * Return the state key for the response examples.
+ * Return the state key for the response examples. Not scoped to a block so the selected response
+ * stays in sync across every operation on the page (like the code sample language selector).
  */
-function getResponseExampleStateKey(blockKey: string | undefined) {
-    return createStateKey('openapi-responses', blockKey);
+function getResponseExampleStateKey() {
+    return createStateKey('openapi-responses');
 }
diff --git a/packages/react-openapi/src/OpenAPIResponses.tsx b/packages/react-openapi/src/OpenAPIResponses.tsx
index 0af72cb24..cac99e909 100644
--- a/packages/react-openapi/src/OpenAPIResponses.tsx
+++ b/packages/react-openapi/src/OpenAPIResponses.tsx
@@ -2,6 +2,7 @@
 
 import type { OpenAPIV3, OpenAPIV3_1 } from '@gitbook/openapi-parser';
 import clsx from 'classnames';
+import type { Key } from 'react-aria';
 import { Markdown } from './Markdown';
 import { OpenAPIDisclosureGroup } from './OpenAPIDisclosureGroup';
 import { OpenAPIResponse } from './OpenAPIResponse';
@@ -105,29 +106,47 @@ export function OpenAPIResponses(props: {
             };
         });
 
-    const state = useResponseExamplesState(context.blockKey, groups[0]?.key);
+    const state = useResponseExamplesState(groups[0]?.key);
 
     const expandAll = context.expandAllResponses;
-    const expandedKeys = expandAll
-        ? new Set(groups.map((g) => g.key))
-        : state.key
-          ? new Set([state.key])
-          : new Set<string>();
+
+    // In expand-all mode the group manages its own (multiple) expanded rows; otherwise it's
+    // controlled and stays in sync with the page-wide responses selector.
+    const disclosureProps = expandAll
+        ? {
+              stateKey: createStateKey('openapi-responses-disclosure', context.blockKey),
+              defaultExpandedKeys: groups.map((g) => g.key),
+          }
+        : {
+              expandedKeys: getExpandedResponseKeys(groups, state.key),
+              onExpandedChange: (keys: Set<Key>) => {
+                  state.setKey(keys.values().next().value ?? null);
+              },
+          };
 
     return (
         <StaticSection header={t(context.translation, 'responses')} className="openapi-responses">
             <OpenAPIDisclosureGroup
                 icon={context.icons.chevronRight}
                 allowsMultipleExpanded={expandAll}
-                expandedKeys={expandedKeys}
-                onExpandedChange={(keys) => {
-                    const key = keys.values().next().value ?? null;
-                    state.setKey(key);
-                }}
                 groups={groups}
                 selectIcon={context.icons.chevronDown}
                 selectStateKey={createStateKey('response-media-types', context.blockKey)}
+                {...disclosureProps}
             />
         </StaticSection>
     );
 }
+
+/**
+ * Resolve the expanded response for the controlled accordion: nothing when the selection is
+ * cleared, otherwise the selected status code, falling back to the first response when this
+ * operation doesn't define it.
+ */
+function getExpandedResponseKeys(groups: { key: string }[], selectedKey: Key | null): Set<string> {
+    if (selectedKey == null) {
+        return new Set<string>();
+    }
+    const key = groups.find((g) => g.key === selectedKey)?.key ?? groups[0]?.key;
+    return key ? new Set([key]) : new Set<string>();
+}