**@@gpt-5** is a Treechat model mention. Put it at the very…
**@@gpt-5** is a Treechat model mention. Put it at the very start of a message to route that one message to the GPT-5 model. Change the tag to switch models (e.g., @@claude-sonnet-4.5). If you omit it, Treechat uses whatever model you selected via the red bot button.