diff --git a/CHANGELOG.md b/CHANGELOG.md
index 766c900..e1ef55f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,10 @@ and this project adheres to
 - 🐛(back) fix system prompt compatibility with self-hosted models #200
 - ⚰️(back) remove dead code and unused files
 
+### Removed
+
+- 🔥(chat) remove thinking part from frontend #227
+
 ## [0.0.10] - 2025-12-15
 
 ### Added
diff --git a/src/frontend/apps/conversations/src/features/chat/components/Chat.tsx b/src/frontend/apps/conversations/src/features/chat/components/Chat.tsx
index 0efdbcb..a620c48 100644
--- a/src/frontend/apps/conversations/src/features/chat/components/Chat.tsx
+++ b/src/frontend/apps/conversations/src/features/chat/components/Chat.tsx
@@ -1,9 +1,4 @@
-import {
-  Message,
-  ReasoningUIPart,
-  SourceUIPart,
-  ToolInvocationUIPart,
-} from '@ai-sdk/ui-utils';
+import { Message, SourceUIPart, ToolInvocationUIPart } from '@ai-sdk/ui-utils';
 import { Modal, ModalSize } from '@openfun/cunningham-react';
 import 'katex/dist/katex.min.css'; // `rehype-katex` does not import the CSS for you
 import { useRouter } from 'next/router';
@@ -816,30 +811,12 @@ export const Chat = ({
                             </Box>
                           )}
                         {message.parts
-                          ?.filter(
-                            (part) =>
-                              part.type === 'reasoning' ||
-                              part.type === 'tool-invocation',
-                          )
+                          ?.filter((part) => part.type === 'tool-invocation')
                           .map(
-                            (
-                              part: ReasoningUIPart | ToolInvocationUIPart,
-                              partIndex: number,
-                            ) =>
-                              part.type === 'reasoning' ? (
-                                <Box
-                                  key={`reasoning-${partIndex}`}
-                                  $background="var(--c--theme--colors--greyscale-100)"
-                                  $color="var(--c--theme--colors--greyscale-500)"
-                                  $padding={{ all: 'sm' }}
-                                  $radius="md"
-                                  $css="font-size: 0.9em;"
-                                >
-                                  {part.reasoning}
-                                </Box>
-                              ) : part.type === 'tool-invocation' &&
-                                isCurrentlyStreaming &&
-                                isLastAssistantMessageInConversation ? (
+                            (part: ToolInvocationUIPart, partIndex: number) =>
+                              part.type === 'tool-invocation' &&
+                              isCurrentlyStreaming &&
+                              isLastAssistantMessageInConversation ? (
                                 <ToolInvocationItem
                                   key={`tool-invocation-${partIndex}`}
                                   toolInvocation={part.toolInvocation}
diff --git a/src/frontend/apps/e2e/__tests__/app-conversations/chat.spec.ts b/src/frontend/apps/e2e/__tests__/app-conversations/chat.spec.ts
index 2e757aa..a059975 100644
--- a/src/frontend/apps/e2e/__tests__/app-conversations/chat.spec.ts
+++ b/src/frontend/apps/e2e/__tests__/app-conversations/chat.spec.ts
@@ -52,7 +52,7 @@ test.describe('Chat page', () => {
 
     const messageContent = page.getByTestId('assistant-message-content');
     await expect(messageContent).toBeVisible();
-    await expect(messageContent).not.toBeEmpty(); 
+    await expect(messageContent).not.toBeEmpty();
 
     // Check history
     const chatHistoryLink = page