diff --git a/studio/frontend/src/components/assistant-ui/thread.tsx b/studio/frontend/src/components/assistant-ui/thread.tsx
index bece2930b3..5d22f82f92 100644
--- a/studio/frontend/src/components/assistant-ui/thread.tsx
+++ b/studio/frontend/src/components/assistant-ui/thread.tsx
@@ -176,6 +176,7 @@ import {
 } from "react";
 import { create } from "zustand";
 import { extractTaggedText, updateThreadMessage } from "@/features/chat/utils/update-thread-message";
+import { useIsMobile } from "@/hooks/use-mobile";
 
 // True while a file is dragged anywhere over the chat page, so the composer
 // can show its "Drop files here" affordance.
@@ -1436,14 +1437,16 @@ const Composer: FC<{
   const mcpEnabledForChat = useChatRuntimeStore((s) => s.mcpEnabledForChat);
   const ragEnabled = useChatRuntimeStore((s) => s.ragEnabled);
   // More than 4 pills: collapse to icons only. Search, Code, and permissions
-  // always show; Images, RAG, Canvas and MCP are conditional.
-  const pillsCompact =
+  // always show; Images, RAG, Canvas and MCP are conditional. Narrow viewports
+  // collapse too: the labelled row is wider than a phone-width composer.
+  const isMobile = useIsMobile();
+  const pillCount =
     3 +
-      (ragEnabled ? 1 : 0) +
-      (supportsBuiltinImageGeneration ? 1 : 0) +
-      (artifactsEnabled ? 1 : 0) +
-      (mcpEnabledForChat ? 1 : 0) >
-    4;
+    (ragEnabled ? 1 : 0) +
+    (supportsBuiltinImageGeneration ? 1 : 0) +
+    (artifactsEnabled ? 1 : 0) +
+    (mcpEnabledForChat ? 1 : 0);
+  const pillsCompact = isMobile || pillCount > 4;
   const activeThreadId = useChatRuntimeStore((s) => s.activeThreadId);
   const setPendingImageEditReference = useChatRuntimeStore(
     (s) => s.setPendingImageEditReference,
diff --git a/studio/frontend/src/features/chat/shared-composer.tsx b/studio/frontend/src/features/chat/shared-composer.tsx
index a72d21aa6b..3156a6411a 100644
--- a/studio/frontend/src/features/chat/shared-composer.tsx
+++ b/studio/frontend/src/features/chat/shared-composer.tsx
@@ -98,6 +98,7 @@ import {
   providerTypeSupportsVision,
 } from "./external-providers";
 import { useExternalProvidersStore } from "./stores/external-providers-store";
+import { useIsMobile } from "@/hooks/use-mobile";
 import {
   PLUS_MENU_ORDER,
   type PlusMenuItemId,
@@ -813,15 +814,17 @@ export function SharedComposer({
   const ragDisabled = modelLoaded && (isExternalModel || !supportsTools);
   const showRagPill = !isExternalModel;
   // Above 4 pills, collapse to icons only. Compare, Search, Code, and
-  // permissions always show; the rest are conditional.
-  const pillsCompact =
+  // permissions always show; the rest are conditional. Narrow viewports
+  // collapse too: the labelled row is wider than a phone-width composer.
+  const isMobile = useIsMobile();
+  const pillCount =
     4 +
-      (showImagePill ? 1 : 0) +
-      (showRagPill && ragEnabled ? 1 : 0) +
-      (showWebFetchPill ? 1 : 0) +
-      (artifactsEnabled ? 1 : 0) +
-      (mcpEnabledForChat ? 1 : 0) >
-    4;
+    (showImagePill ? 1 : 0) +
+    (showRagPill && ragEnabled ? 1 : 0) +
+    (showWebFetchPill ? 1 : 0) +
+    (artifactsEnabled ? 1 : 0) +
+    (mcpEnabledForChat ? 1 : 0);
+  const pillsCompact = isMobile || pillCount > 4;
   // Backwards-compatible alias for call sites still referencing
   // `toolsDisabled` (rare; both pills used it before).
   const toolsDisabled = codeDisabled;
@@ -1781,7 +1784,7 @@ export function SharedComposer({
       />
       <div className="composer-action-wrapper">
         <div
-          className="flex items-center gap-0.5"
+          className="flex min-w-0 flex-wrap items-center gap-0.5"
           data-pill-compact={pillsCompact ? "true" : undefined}
         >
           <input
diff --git a/studio/frontend/src/index.css b/studio/frontend/src/index.css
index b06dc03fba..2192cfb2cd 100644
--- a/studio/frontend/src/index.css
+++ b/studio/frontend/src/index.css
@@ -1606,7 +1606,7 @@ html[data-chat-font] .aui-root {
 	}
 
 	.unsloth-composer-left {
-		@apply flex shrink-0 items-center gap-0.5;
+		@apply flex min-w-0 flex-wrap items-center gap-0.5;
 		order: 1;
 		/* Pull the plus button closer to the composer edge. */
 		margin-left: -0.25rem;