What
A new callout prompts users to choose their preferred thinking intensity when first using Opus 4.6.
Details
- Appears when using Opus 4.6 for the first time
- Offers "medium" (balances efficiency and intelligence) or "high" (best for hardest tasks) options
- Pro plan users default to medium effort; others default to high
- The callout can be dismissed and won't reappear
- Effort can always be changed later via
/model
Evidence
Effort callout modal (search for "Effort in Opus 4.6")
Strings lifted out of the shipped bundle, so the claim above can be checked against them.