# GPT-6.1 Sol, Sonnet 5.5, and # for channels

_Release #079, September 30, 2026. Agent smarts, Viktor app_

Two new models land in the picker, Balanced and Ultra move to Claude Opus 5.5, and # in chat references Slack channels.

- **New models.** GPT-6.1 Sol arrives at GPT-6 Sol's price, and Claude Sonnet 5.5 is out of beta for everyone.
- **Presets upgraded.** Balanced (and !fast) now runs Opus 5.5 at low reasoning, Ultra runs it at high. Nothing to change on your end.
- **# for channels.** Type # in web chat to pick a Slack channel you can read and point Viktor straight at it.
- **Docs for everything.** viktor.com/docs now covers every user-facing feature, by category.

Source: https://viktor.com/changelog/2026-09-30-gpt-6-1-sol-sonnet-5-5-channels