Google has scheduled the removal of Claude Sonnet 4.6, Claude Opus 4.6 and GPT-OSS-120B from Antigravity, its AI development tool, for November 2, 2026. Developers and small-business app builders using those models will need another choice, according to Google’s model notice.
Continuing with Antigravity does not require buying a subscription: Gemini remains available on every plan. Keeping access to Claude, however, depends on the account’s subscription eligibility.
The notice does not specify a cutoff hour or timezone, or confirm completion across accounts. Its original announcement date is unverified; November 2 is the scheduled effective date.
Which models remain on your plan?
Excluding the three scheduled removals, Google’s availability table lists these personal-account choices:
Plan | Remaining listed models |
|---|---|
Free or Google AI Plus | Gemini 3.8 Flash. |
Google AI Pro trial | Gemini 3.8 Flash; Gemini 4 Argon only with eligible premium-device trials. Neither Claude 5.5 model. |
Paid Google AI Pro or Google AI Ultra | Gemini 3.8 Flash, Gemini 4 Argon, Claude Sonnet 5.5 and Claude Opus 5.5. |
The premium-device trial exception applies to Argon, not Claude. The FAQ’s paid-plan guidance also distinguishes Pro trials from paid subscriptions.
For organizations, Gemini Enterprise lists those four models plus Gemini 3.7 Flash, 3.6 Flash and 3.1 Pro. Claude requires administrator activation and token-based billing. Enterprise deployment supports the Antigravity App, command-line tool and editor extensions—not the standalone Antigravity IDE.
Model access and usage allowance are different
Under Google’s usage rules, free and Plus allowances reset weekly. Pro replenishes every five hours until a weekly ceiling is reached; Ultra has five-hour replenishment and the highest weekly allowance. Limits depend on the work the agent performs, not a fixed number of prompts, and can change.
The practical implication: a Pro trial can have Pro usage allowances without qualifying for the newer Claude models. Check which model your account can use before considering how much work it can do.
Pro and Ultra users can use purchased or one-time promotional credits after their baseline allowance runs out. Google documents these as extra usage, not a way to unlock excluded models. Buying credits and obtaining model access are separate decisions.
Choose a replacement before changing your subscription
If Gemini meets your needs, the removal notice alone is no reason to upgrade. Evaluate a replacement on representative work before relying on it for important changes; availability does not establish equivalent results.
If you specifically need Claude, Google’s FAQ directs Pro-trial users to request a switch to paid Pro or upgrade to paid Ultra. Partner-managed subscriptions have separate guidance. Check what a switch would mean for your existing offer before ending a trial.
For a price reference, Google’s US plans page lists Pro at US$19.99 a month in its savings calculator. That is not a worldwide price or an account-specific quote; regional pricing and promotional terms can differ.
This deadline concerns Antigravity’s catalogue, not a global retirement of these models. Teams also using Claude directly should distinguish it from the separate November 30 deadline for Opus 4.8 fast mode.