I’ve read (but haven’t tested yet) that you can still enable Opus 4.6 with:
/model claude-opus-4-6[1M]
That gets billed as extra usage apparently:
⎿ Set model to Opus 4.6 (1M context) · Billed as extra usage
That gets billed as extra usage apparently:
/model claude-opus-4-6[1M]