An X post and two attached screenshots report that Antigravity is preparing to make Claude Opus 5.5 and Claude Sonnet 5.5 available on paid Pro and Ultra plans. The same screenshots say GPT-OSS 120B will be removed from Antigravity on November 2, 2026. The report is not an official Antigravity announcement, so the rollout status and exact plan eligibility remain unconfirmed.
In a post on X, @thtbee_ says the two Claude models are coming to Antigravity’s Pro and Ultra plans and points to the GPT-OSS 120B removal. The attached notice says that Opus 5.5 and Sonnet 5.5 are available on paid Pro and Ultra plans. It also says third-party model access will no longer be available on the viewer’s current plan starting November 2, 2026.
Image credit: @thtbee_ on X
The notice does not establish that every Pro or Ultra user already has access, or that either Claude model has completed a broad rollout. It also does not explain why the notice refers to paid Pro and Ultra plans while saying third-party access will end on the viewer’s current plan, even though the post author says they are already on Pro. Users should therefore treat the message as account- and rollout-specific until Antigravity provides clearer documentation.
GPT-OSS 120B is reportedly scheduled for removal
A second notice shown in the post says GPT-OSS 120B will be removed from Antigravity on November 2, 2026. GPT-OSS 120B is the specific third-party model named in the reported change. The post and screenshots do not give a reason for its removal, identify a replacement or describe any new usage limits.
Image credit: @thtbee_ on X
For users who rely on GPT-OSS 120B in Antigravity, November 2, 2026, is the reported removal date rather than a confirmed platform-wide deadline. The evidence does not establish whether access will disappear for every account on that date or only for accounts affected by the displayed plan change.
What the report confirms about plan access
The screenshots show Antigravity interface notices referring to Claude Opus 5.5, Claude Sonnet 5.5 and GPT-OSS 120B. They do not confirm that Antigravity has officially rolled out the Claude models to all Pro or Ultra subscribers, nor do they provide information about limits, pricing or access on other plans.
The plan discrepancy is the main unresolved issue. The notice says third-party model access will no longer be available on the viewer’s current plan, while the post describes the Claude models as arriving on Pro and Ultra. Neither the post nor the screenshots explains whether “current plan” refers to a different account tier, a temporary entitlement or a staged rollout. Readers should check the plan-specific message shown in their own Antigravity account rather than assume that the report applies identically to every subscriber.
Gemini 4 Argon remains speculation
The post suggests that the GPT-OSS 120B removal could be a hint of a future Gemini 4 Argon rollout. That is the author’s speculation, not a confirmed detail in the screenshots. The evidence does not confirm a Gemini 4 Argon release, its timing or a connection between that model and the reported GPT-OSS 120B removal.
For now, the report points to two possible access changes: reported Claude 5.5 notices for paid Pro and Ultra plans and a reported GPT-OSS 120B removal on November 2, 2026. Official Antigravity documentation or an announcement would be needed to resolve the plan eligibility, rollout status, account-wide removal and any replacement model.
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