Google just put Claude Opus 5.5 inside its own coding tool. The announcement going around skips the second sentence of the notice.
Here's the full thing, from inside Antigravity:
"Opus 5.5 and Sonnet 5.5 are available on paid Pro and Ultra plans. Third-party model access will no longer be available on your current plan starting on November 2, 2026."
So two things happened at once:
> the newest Claude models are now in Google's IDE
> they sit behind Google AI Pro ($19.99/month) or Ultra
> Claude Opus 4.6 and GPT-OSS in the picker are now marked "Notice"
> on the current plan, that access ends November 2
Google's own IDE, built around Gemini, now uses Anthropic's top model as a reason to upgrade.
If you've been using Claude in Antigravity without paying, you have 30 days to decide:
> pay Google for AI Pro
> move that work to Claude Code
> or switch the picker to Gemini and see if you notice
Which one are you picking?