Cursor may be starting costly subagents during tasks
In a case, a plan made in Claude Code was placed into Cursor, and Cursor Grok 4.5 was selected as the agent. Cursor then started Sonnet and Opus 4.8 during the task. The account was on Cursor’s $60 plan, with usage freshly reset that day, and this single run used 20% of the allowance.
The usual workflow had been to plan with Opus and build with , without noticing this kind of hit before. The open question is whether this is expected behavior or a Cursor bug.
Key points
- Cursor Grok 4.5 appeared to start Sonnet and Opus 4.8 during one task.
- One run used 20% of a freshly reset allowance on the $60 plan.
- had not previously shown the same kind of usage hit in this workflow.
- It is unclear whether this is normal behavior or a bug.