I'm hitting this too! And I assumed it was a backwards-compatibility issue with my live conversation with Opus 4.7, but then I hit it in a fresh conversation with Opus 4.8. Vibe code release bug I guess?

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IFC_LLC 4 hours ago | parent [-]

I mean, switching back to 4.7 does not work either. So console it is. But vibe release - for sure.

And I'm paying money for this.

	▲	KAdot 4 hours ago \| parent [-]
		Going back to 4.7 with `claude --model claude-opus-4-7` fixed it for me.