Hi, both in my cursor rules, and prompt during auto i told it to only use certain models and not use the fast versions.
How can i disable the fast versions? I do not ever want to use these!
Hey, thanks for the report. What you see in the screenshot, subagents switching to Grok 4.5 High Fast even though you clearly disabled fast in the prompt, isn’t caused by anything in your settings. Right now, rules and prompts don’t reliably control which model subagents pick, especially on resume, and there isn’t a separate toggle in settings for never use fast variants yet. This is an issue we’re tracking.
What you can try as a temporary workaround:
- Open the model picker, select Grok 4.5 manually, and explicitly turn off Fast. This pins the setting for the main agent, but note there’s a known issue where Fast sometimes turns itself back on, so please double check.
- If you run your subagents via
.mdfiles, set the model directly in the agent’s frontmatter. That makes it less likely the parent agent will override it. - Keep in mind some built-in subagents, like explore, currently default to a fast variant and don’t follow Auto or rules. That’s part of what we’re tracking.
There’s no one-click way to fully block fast everywhere yet. I can’t share an ETA, but I’ll reply in the thread if there’s an update. Let me know if manually turning off Fast in the picker helps.