Gemini 3.5 Pro lands for UK Google AI subscribers: what changes

Gemini 3.5 Pro is rolling out to Google’s paid AI subscriptions this month, and if you pay for Google AI Pro (£18.99 a month) or Google AI Ultra (from £79.99 a month) in the UK, you are first in the queue to get it. Google announced the model at Google I/O on 19 May 2026 and said general availability was targeted for June, reaching its consumer subscribers before anyone else (per Google’s Gemini blog and a 19 May TechCrunch report). The honest position as I write this on 22 June: it has not fully landed for every UK account yet, so think of this as a switch being flipped gradually rather than a single launch day.

Which Google AI tier unlocks Gemini 3.5 Pro?

The short answer: the two paid consumer plans, Google AI Pro and Google AI Ultra, are the ones getting the new model first. On the UK subscription pages I checked on 22 June, Google AI Pro is £18.99 a month and Google AI Ultra starts at £79.99 a month, climbing to £189.99 a month for the very highest usage limits. Below those sits Google AI Plus at £4.49 a month, and a free tier that runs on lighter, faster models. Google’s own framing at I/O was that 3.5 Pro reaches “our consumer subscriptions” first, which lines up with how it shipped earlier models, and a 6 June TechTimes report described the same staged plan.

One catch worth flagging before you upgrade: Pro and Ultra are not the same experience. The standout reasoning feature, “Deep Think”, is being held back for Ultra subscribers. Pro buyers get the full 3.5 Pro model and its roughly 2-million-token context window, but the extended, deliberate thinking mode that grinds through the hardest problems is the Ultra carrot. If your reason for upgrading is purely Deep Think, the £18.99 Pro plan will not give it to you. I cover the wider field, including how Google’s assistant stacks up against rivals, in our Gemini vs Claude vs Copilot comparison if you are still deciding which subscription is worth your money.

What changes on your UK phone

This is the part that matters most for a phone, because Gemini already lives on Pixel and Samsung handsets as the built-in assistant. With 3.5 Pro behind the Gemini app, the everyday wins are about depth rather than speed: it can hold far more of a long document, chat thread or codebase in mind at once, and it handles mixed inputs, text, images and voice together, more confidently. If you have ever fed Gemini a long PDF or a messy screenshot and watched it lose the plot halfway through, a bigger context window is the fix you have been waiting for. For a walk through of getting the assistant set up properly on either platform, our guide to setting up Gemini on Pixel and Samsung is the place to start, and our overview of Gemini’s 2026 UK features covers what is already live.

Here is where I got stuck the first time: the model upgrade does not automatically change which tier you are on. Picking 3.5 Pro inside the Gemini app on a UK phone still depends on your subscription, so a free-tier user will keep being routed to the lighter models for most tasks. Google has said the newest models reach paying subscribers first, then trickle down, so free users do tend to get something eventually, just later and usually with tighter limits. If you own a Pixel and want the bigger Android picture, our rundown of Android 17 for UK Pixel owners explains which Gemini features are tied to the OS itself.

Pay for Pro and you get the smarter model; pay for Ultra and you get the smarter model plus Deep Think. The £61 monthly gap is almost entirely about that reasoning mode and the usage limits.

Is the upgrade worth it for most people?

For a lot of UK readers, honestly, no, not yet. The free Gemini app is already capable for quick questions, drafting and image understanding, and unless you regularly hit the wall on long documents or want the heaviest reasoning, £18.99 a month is real money for a refinement rather than a transformation. I would frame the Pro plan as the sweet spot for people who lean on the assistant for work: longer context, fewer cut-offs and priority access to the newest model. Ultra, at £79.99 a month and up, only makes sense if Deep Think and the much higher usage limits genuinely change how you work, which for most phone owners they will not.

It is also worth keeping the rollout caveat front of mind. Several outlets tracking the launch, including a 6 June TechTimes piece and Google’s own I/O messaging, describe 3.5 Pro as reaching consumers gradually through June rather than switching on everywhere at once. So if you upgrade today and the app still serves you an older model, that is the staged rollout, not a fault. Give it a few days. If you want to see how Google’s assistant compares head to head with Apple’s revamped Siri, our new Siri vs Google Gemini face-off is a useful gut check before you commit, and the bigger strategic picture is in our look at why Google DeepMind matters in the UK.

Where to check pricing and sign up

The cleanest place to confirm what you will pay and which model you are getting is Google’s own UK subscription page at gemini.google/gb, which is where I pulled these figures (last checked: 2026-06-22). Google AI Pro is £18.99 a month, Google AI Ultra starts at £79.99 a month and runs to £189.99 a month, and Google AI Plus is £4.49 a month. You can also manage and pay for these through the Google One settings in the Gemini app on your phone, which is handy if you would rather not juggle another login. New buyers sometimes see an introductory discount on the Pro plan, so it is worth checking the live page before you pick a tier rather than trusting a price you saw last month.

If you are upgrading partly for a new device anyway, our guide to the Pixel 11 and its Tensor G6 chip is worth a read, since Google tends to pair its newest on-device AI tricks with its latest phones, and tablet users can see our best Android tablet picks for 2026 where the bigger screen makes long-context chats far easier to follow.

My take: upgrade only if you hit the limits

Gemini 3.5 Pro is a meaningful step up if you live in the Gemini app and keep running into its old limits, but it is not a reason to panic-subscribe. If you are a heavy user who wrestles with long documents on your phone, the £18.99 Pro plan is the one I would point you at, and you are getting it before almost anyone else in the UK. If you mostly ask quick questions, stay free for now and let the new model reach you in its own time. And if you genuinely need Deep Think, accept that you are paying £79.99 a month or more for it, because Google has deliberately put it behind the Ultra wall. Check the live UK page, decide on the basis of how you actually use your phone, and ignore the launch-day noise.