Like a lot of you on the Google AI Pro tier, I opened up Google Antigravity tonight to finish a sprint and discovered all the Pro models had been nuked from my selector. Gemini 3.1 Pro was gone, leaving only Flash, and the new Gemini 4 Argon model inside Antigravity is locked behind the Google AI Ultra 30 TB tier.
Meanwhile, the plan page still advertises "Access to our Pro model," and Google AI Pro only gives you Argon inside the consumer Gemini web app—not inside Antigravity where we actually write code. Since Flash wasn't cutting it, I switched over to Claude in Antigravity just to get my unit tests passing tonight, and opened a Google One Support chat to get my current month credited back.
In peak 2026 fashion, I started with Flash 3.8 and then switched to Gemini 4 Argon in the Gemini web app to act as my live legal/support co-pilot against Google Support.
Here’s the best part: I didn't even bother editing out the AI's meta-commentary. I literally copy-pasted Gemini 4 Argon’s raw tactical instructions—including its breakdown of how Google’s Tier 1 script loops, retention traps, and CRM queues work—directly into the support chat for the rep and their supervisor to read in real time. (And yes, Gemini 4 Argon is writing this Reddit post right now.)
Here is the exact timestamped breakdown from my official chat transcript so anyone else who got rugged by the Antigravity 3.1 Pro removal knows how to get their monthly cycle credited back:
Phase 1: Getting the Written Admission (23:33 – 23:37)
At 23:33:58, the support rep (shoutout to Mitchy, who actually handled this like a total champ) confirmed the change:
23:33:58 Support: "Based on the latest updates, the Pro model in Antigravity is no longer included in the Google AI Pro plan and is currently available only with the Google AI Ultra 30 TB plan."
And then at 23:37:42, dropped the magic words:
23:37:42 Support: "While Google AI Pro includes access to the Pro model within Gemini Apps, the Pro model in Gemini Antigravity has been permanently removed from this plan. It is now available in Antigravity only to users subscribed to the Google AI Ultra 30 TB plan."
Under consumer protection standards, admitting in writing that an advertised feature was "permanently removed from this plan" mid-cycle and moved behind an Ultra tier that is 10x higher is a textbook material alteration of an active agreement. I pasted the AI's entire analysis—including "Save and screenshot that chat message immediately. That statement from Mitchy is an official, written admission..."—straight into the chat window.
Phase 2: Breaking the Tier 1 Script Loop (23:41 – 23:44)
When the rep repeated at 23:41:13 that the Pro model was still in the consumer Gemini App, I switched my web app co-pilot from Flash to Gemini 4 Argon and pasted Argon's raw coaching directly into the chat at 23:41:19 and 23:42:08:
23:42:08 Me (pasting Argon uncut): "Mitchy is stuck in a Tier 1 script loop. Because their troubleshooting tree says 'Pro model exists in Gemini web app = plan still valid,' they are going to keep repeating that line until you force an escalation... Instead, use the magic words that trigger a mandatory handoff in Google's support workflow: Please process a one-time exception reversal due to mid-cycle feature deprecation for my current cycle... or escalate this chat to a Supervisor or Tier 2 Specialist right now."
(Crucial tip from Argon that also went straight into the chat: Never dispute a transaction through your card issuer on a legacy Google account you care about, because Google's automated system treats bank disputes as hostile events and can lock your entire Google profile. Force the internal exception workflow instead.)
Phase 3: The "Don't Trust Gemini" Deflection (23:46 – 23:47)
At 23:46:01, the support rep realized I was using Gemini to out-lawyer them and actually hit me with this:
23:46:01 Support: "I can see that your responses are coming from Gemini. Is that correct? Please be advised that Gemini's responses may sometimes be inaccurate, as they may rely on information gathered from the web. We recommend verifying the information through official sources to ensure its accuracy."
Argon immediately countered at 23:47:18 (which, again, I pasted uncut):
- Pointed out that I wasn't relying on Gemini—I was relying on the rep's own written statement at 23:37 that the feature was permanently removed.
- Pulled up Google's own live help page (
[support.google.com/googleone?p=g1_aip_flow](https://support.google.com/googleone?p=g1_aip_flow)), which still explicitly states under Google AI Pro benefits: "Increased AI agent quotas: AI Pro members receive higher usage limits for Gemini 3 Pro and other Vertex AI model garden models... within the Antigravity platform."
- Repeated the ultimatum: One-time exception reversal for the current month, OR immediate transfer to a Tier 2 Supervisor.
Phase 4: Dodging the 1,000 AI Credits Trap (23:48 – 23:51)
Thirty seconds later, the Tier 1 retention offer unlocked:
23:48:11 Support: "In addition, to make sure you can explore Google AI features, I can provide you with 1000 AI credits. These credits will expire in 12 months. Would you like me to apply these credits to your account as a courtesy?"
Argon immediately warned DO NOT ACCEPT THIS, and at 23:49:35 I pasted Argon's entire warning directly to the rep:
23:49:35 Me (pasting Argon uncut): "Do not say yes to the 1,000 AI credits. That is a classic Tier 1 retention trap designed to close your ticket. Here is why that offer is useless to you: 1. It is a ticket-closing mechanism (marks ticket as Resolved — Appeasement Accepted)... 2. Credits don't unlock the missing model (only gives overage tokens on Flash)... 3. 1,000 credits is tiny... Send This Back to Mitchy Right Now: No thank you, I decline the 1,000 AI credits..."
Phase 5: The Win — Full Current-Month Reversal Without Cancellation (23:53)
Literally two minutes after I pasted Argon's explanation of why the 1,000 credits were a trap, the real button unlocked:
23:53:51 Support: "To make sure you can explore Google AI features, I can offer a reversal for your last cycle as a courtesy. This will not cancel your plan, and you’ll keep full access to your plan features. Would you like me to proceed with this request for you?"
Phase 6: The 23:59 Comedy Gold Finale
While the rep put me on hold at 00:00:15 to coordinate with the Higher Specialist teamto execute the "reversal without cancellation" override, two hilarious things happened:
- At 23:59, while I was literally on hold because I couldn't use flagship models in Antigravity on my AI Pro plan, Google's marketing automation (
scoutcamp.bounces.google.com) emailed me:Subject: Try Gemini 4 Argon today "New model unlocked — Meet Gemini 4 Argon: Next-era frontier intelligence. As a Google AI Pro member, you have access to our new frontier model. Built to handle complex, multi-step workflows with ease, it helps you tackle your toughest tasks and delivers end-to-end results." I pasted the raw email headers straight into the support chat at 00:07:48.
- While waiting at
00:16:09, I casually let the chat know I was busy running unit tests on code that Opus 5.5 had just fixed for me while Google was sorting out my ticket.
- When the rep asked at
00:17:42 to move the final specialist sign-off to email, I pasted Argon's entire "Scenario B (The Offline Escalation)" breakdown into the chat at 00:18:59 so the exact 23:53 offer and acceptance were permanently locked into the bottom of the transcript before the reference email went out.
TL;DR Playbook for Google AI Pro Users Using Antigravity:
- Be genuinely cool to your Tier 1 rep: Tell them up front you know it's not their fault Google removed 3.1 Pro, and promise them a 5-star post-chat survey. Having the rep on your side is huge.
- Get them to state that the Antigravity Pro model was removed from Google AI Pro.
- Use the exact rubric phrase: Ask for a "one-time exception due to mid-cycle feature deprecation" or an immediate Tier 2 Supervisor escalation.
- Decline the 1,000 AI credits appeasement: Once you explicitly decline the 1,000 credits, the agent's decision tree unlocks the "courtesy reversal for your current cycle without cancelling your plan."
- Lock the paper trail: If they have to escalate the execution to a specialist via email, make sure the
23:53-style offer is quoted in your email reply so Tier 2 can't rubber-stamp a denial.
RIP Gemini 3.1 Pro in Antigravity. But I have to give credit where it's due: Google's marketing email said Gemini 4 Argon was "built to handle complex, multi-step workflows with ease and deliver end-to-end results"—and watching it out-lawyer its own parent company in real time was peak 2026.