Google is paywalling a Gemini model its own Flash overtook in May — and charging $4.99 subscribers nothing for the privilege of losing it

Two ratchets in six months, both one tier down

Google’s support page is admirably plain about it: “Starting in October 2026, there will be changes to model availability for Gemini Apps when you use a personal account. These changes will start to take effect for users without an AI subscription on October 9th.”

What follows is a four-row table.

Model access verified 4 October 2026 against Google’s Gemini Apps model availability page; prices per independent reporting, and they vary by region.

Set that against the previous ratchet. On 1 April 2026, Google made the Pro model paid-only in the Gemini app while Flash and Flash-Lite remained free. Six months later, Flash becomes paid-only too. Each step moved the free line down exactly one tier, and neither was accompanied by a reason.

The genuinely new element is Deep Think descending to AI Pro. This is not a purely subtractive release — the $19.99 tier gets more, the two tiers below it get less, and the gap between them widens at both ends.

The model being withdrawn is not the model you think it is

Everything about the framing of this change — “Plus subscribers lose Pro” — implies that the people paying $4.99 a month are losing Google’s best. Check the version numbers, which 9to5Google reports as (3.5) Flash-Lite, (3.6) Flash and (3.1) Pro.

Gemini 3.1 Pro. That is the model that has been sitting in the “Pro” slot since Gemini 3.5 Pro missed its third launch deadline in July 2026, after Google reportedly scrapped a nearly-ready base model and restarted pretraining. No 3.5 Pro, no 3.6 Pro, no 3.7 Pro. The app’s Pro slot has been running a model from an earlier generation all year.

Meanwhile the Flash line kept moving. At I/O 2026 in May Google described Gemini 3.5 Flash as surpassing 3.1 Pro on benchmarks, with 4x faster output. 3.6 Flash shipped in July with DeepSWE moving 37% → 49%. 3.8 Flash shipped on 2 September — the fourth Flash in under four months — scoring 59 on the Artificial Analysis Intelligence Index at high reasoning.

So the arithmetic for an AI Plus subscriber is this: you lose a model that Google itself said was beaten five months ago, and you keep the model that beat it. On capability, close to nothing changes. What you actually lose is Deep Think, which was never yours, and the right to say your plan contains what its sales page says it contains.

That last point is not rhetorical. As of 4 October, the Google One AI plans page still lists “access to Gemini 3.1 Pro” as an AI Plus benefit. The plan is being shrunk while the page selling it advertises the thing being removed.

A paid plan with an unpublished downgrade date

The 9 October date applies to accounts without a subscription. For AI Plus, Google’s position — as reported by 9to5Google and corroborated across the coverage — is that subscribers “will receive an email that explains when these changes will take effect,” with the cutoff varying by account.

Take that seriously as a procurement fact rather than a scheduling detail. A paying customer of a $4.99/month subscription cannot, today, look up the date their subscription shrinks. It is not on the support page, not on the pricing page, and not derivable from their renewal date. It arrives in an email, on Google’s schedule, per account.

Staged rollouts are normal engineering practice and there is nothing sinister in batching them. But there is a difference between staging when a feature arrives and staging when a paid entitlement is withdrawn, and the second one has a published-date obligation the first does not. Compare the vendor behaviour this desk has been tracking all quarter: Anthropic marked Sonnet 5 legacy with a retirement commitment of no sooner than 30 June 2027 and a migration guide; OpenAI published 30 October as the date Pro 200’s included allowance halves. Both of those are unwelcome changes with a date you can diary. This one is not.

Practical consequence: if you run AI Plus seats for a team through personal accounts, you have no scheduled date to plan a migration against, and the accounts will change at different times.

The free tier is the change that matters

Strip out the version-number confusion and one real loss remains. Until 9 October, anyone could open the Gemini app and use 3.6 Flash — a current-generation model, good enough that it beats the Pro slot above it — for free, with usage caps. From 9 October they get 3.5 Flash-Lite, Google’s cheapest and weakest tier, which exists to be fast and nearly free to serve.

That ends free evaluation of Gemini as a product. And it lands at an awkward moment, because the consumer app was already behind: the app serves 3.6 Flash while the API has been on 3.8 Flash since 2 September. After 9 October a free user is three model steps behind what Google actually ships, which means the Gemini most prospective buyers will ever touch is not representative of the Gemini they would be buying.

For this site, that changes a piece of standing advice. “Try the free tiers and see which one you like” has been the correct opening move for comparing ChatGPT, Claude and Gemini. For Gemini specifically it no longer is. Compare paid against paid, or evaluate Gemini through AI Studio, which is outside the scope of this notice and still exposes the current model.

Google has published no reason, and the honest answer is that nobody outside Google knows. Serving economics is the obvious candidate — Flash-Lite is the cheapest thing Google runs and the app passed a billion monthly active users in August. Reserving capacity ahead of a larger flagship is the other, given Google has teased Gemini 4. Neither is confirmed, and the inference does not change what a buyer should do.

What to do before 9 October

1. If you evaluate Gemini on the free app: do it this week, or switch your evaluation to AI Studio or the API, both unaffected. After 9 October the free app is not a sample of the product.
2. If you pay $4.99 for AI Plus: watch your inbox for the individual cutoff date, because it exists nowhere else. Then check what you actually used Pro for — if it was general quality, 3.6 Flash is the better model and you lose nothing.
3. If you need Deep Think or real Pro access: the only route is AI Pro at $19.99/month, a 4x step up from Plus. That tier is unaffected by this change and gains Deep Think, so it is the one tier that got better this week.
4. If you are on Workspace or build on the API: nothing changes. Verify this against your own account rather than the consumer notice, since the scope language covers personal accounts only.
5. If you are shortlisting an assistant this month: the best AI chatbots comparison is still decided on paid tiers, where Gemini’s $19.99 bundle with 5TB of Drive storage remains the strongest value in the category. Only the free-tier row of that comparison moved.

The pattern worth filing is the one underneath all of it. A subscription’s contents are not fixed by the price you agreed to, and the second ratchet is always easier than the first. Six months ago the free line moved down one tier and nobody organised about it. This week it moved again.

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