Add model availability

Author: ntrogh

release-notes/images/1_103/release-highlights.png

@@ -25,12 +25,12 @@ Welcome to the July 2025 release of Visual Studio Code. There are many updates i
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     <td>Revamped tool picker experience <a href="#tool-picker-improvements"><br>Show more</a></td>
-    <td>Restore to a previous good state with chat checkpoints <a href="#chat-checkpoints"><br>Show more</a></td>
+    <td>GPT-5 is now available <a href="#openai-gpt-5-available-in-chat"><br>Show more</a></td>
     <td>Check out multiple branches simultaneously with Git worktrees <a href="#git-worktree-support"><br>Show more</a></td>
   </tr>
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     <td>Enable more than 128 tools per agent request <a href="#tool-grouping-experimental"><br>Show more</a></td>
-    <td>Fast code search for Azure DevOps repos <a href="#azure-devops-repos-remote-index-support"><br>Show more</a></td>
+    <td>Restore to a previous good state with chat checkpoints <a href="#chat-checkpoints"><br>Show more</a></td>
     <td>Manage coding agent sessions in a dedicated view <a href="#chat-sessions-experimental"><br>Show more</a></td>
   </tr>
 </table>
@@ -69,6 +69,21 @@ Navigation End -->
 
 ## Chat
 
+### OpenAI GPT 5 available in chat
+
+TODO:
+- confirm if GPT-5 is available for all plans
+- update link to changelog post
+- update screenshot with GPT-5
+
+You can now use the GPT-5 reasoning model for your chat conversations in VS Code. GPT-5 is OpenAI's latest and most sophisticated model, which can complete longer and more complex coding tasks and shows significant improvements to coding personality, front-end aesthetics and code quality. Learn more about the GPT-5 model availability in the [GitHub blog post](https://github.blog/changelog/).
+
+To get started, open the Chat view and choose GPT-5 from the model picker.
+
+![Screenshot of the model picker showing various models from providers such as Copilot and OpenRouter](images/1_103/modelpicker.png)
+
+Learn more about [using language models in VS Code](https://code.visualstudio.com/docs/copilot/language-models).
+
 ### Chat checkpoints
 
 **Setting**: `setting(chat.checkpoints.enabled)`