Update base model

Author: ntrogh

release-notes/v1_100.md

@@ -21,7 +21,6 @@ Welcome to the April 2025 release of Visual Studio Code. There are many updates
   * Custom instructions and reusable prompts ([more...](#prompt-and-instructions-files)).
   * Smarter results with tools for GitHub, extensions, and notebooks ([more...](#search-code-of-a-github-repository-with-the-githubrepo-tool)).
   * Image and Streamable HTTP support for MCP ([more...](#mcp-support-for-streamable-http)).
-  * GPT 4.1 is the base model ([more...](#use-gpt-41-as-the-base-model))
 
 * **Chat performance**
   * Faster responses on repeat chat requests ([more...](#conversation-summary-and-prompt-caching)).
@@ -125,9 +124,9 @@ We've implemented support for OpenAI's apply patch editing format (GPT 4.1 and o
 
 The update for OpenAI models is on by default in VS Code Insiders and gradually rolling out to Stable. The Anthropic update is available for all users in both Stable and Insiders.
 
-### Use GPT 4.1 as the base model
+### Base model in chat
 
-When you're using chat in VS Code, the base model is now updated to GPT-4.1. You can still use the model switcher in the Chat view to change to another model.
+We're gradually rolling out GPT-4.1 as the default base model in chat in VS Code. You can use the model switcher in the Chat view to change to another model at any time.
 
 ### Search code of a GitHub repository with the `#githubRepo` tool