Plan mode versus thinking effort
Plan mode is not a synonym for a more cautious mode of operation generally, and it is not the same lever as thinking effort. It specifically changes whether actions run immediately or get recorded for later approval, not how carefully the model reasons about each one.
Thinking effort, covered in Thinking process, changes how deeply the model deliberates before deciding on an action in the first place; plan mode changes what happens once it has decided.
Combining plan mode with a higher effort level is a reasonable pairing specifically for the most consequential changes, since the two address genuinely different concerns and stack cleanly rather than overlapping.
| Plan mode | Thinking effort | |
|---|---|---|
| Changes | Whether actions run or get recorded | How deeply the model reasons before acting |
| Scope | One session, entered explicitly | Persists as your default across sessions |
Neither one is a substitute for the other in the case where you actually need both: a low-effort session in plan mode still batches its actions for review, and a high-effort session outside plan mode still asks for approval action by action, described in Thinking process.