diff --git a/.changeset/serious-keys-explain.md b/.changeset/serious-keys-explain.md
new file mode 100644
index 0000000000..07eca3a458
--- /dev/null
+++ b/.changeset/serious-keys-explain.md
@@ -0,0 +1,5 @@
+---
+"gitbook": patch
+---
+
+Fix: Long strings overflow out of message bubble in docs assistant
diff --git a/packages/gitbook/src/components/AI/server-actions/AIToolCallsSummary.tsx b/packages/gitbook/src/components/AI/server-actions/AIToolCallsSummary.tsx
index 27863fd80c..6432ee2d05 100644
--- a/packages/gitbook/src/components/AI/server-actions/AIToolCallsSummary.tsx
+++ b/packages/gitbook/src/components/AI/server-actions/AIToolCallsSummary.tsx
@@ -167,7 +167,7 @@ async function DescriptionForSearchToolCall(props: {
                     hasResults ? '-my-2 cursor-pointer py-2 hover:bg-primary-hover' : ''
                 )}
             >
-                <div className="flex flex-col leading-snug">
+                <div className="flex min-w-0 flex-col break-words leading-snug">
                     <p>{t(language, 'searched_for', <strong>{toolCall.query}</strong>)}</p>
                     <p className="mt-0.5 text-tint-subtle text-xs">
                         {hasResults
diff --git a/packages/gitbook/src/components/AIChat/AIChatMessages.tsx b/packages/gitbook/src/components/AIChat/AIChatMessages.tsx
index a5accb571b..52b1bfda15 100644
--- a/packages/gitbook/src/components/AIChat/AIChatMessages.tsx
+++ b/packages/gitbook/src/components/AIChat/AIChatMessages.tsx
@@ -32,6 +32,7 @@ export function AIChatMessages(props: {
                             'scroll-mt-36',
                             'lg:scroll-mt-0',
                             'flex flex-col gap-6',
+                            'break-words',
                             'group/message',
                             message.role === AIMessageRole.User
                                 ? 'max-w-[80%] self-end circular-corners:rounded-2xl rounded-corners:rounded-md bg-tint px-4 py-2'