Here’s a number worth sitting with. Around four in ten regular AI users pay for no chat tool at all, not because they stopped using it, but because the bill stopped making sense. They are voting with their wallets.

If you’re reading this, you know your own version. A ChatGPT Plus charge here. A Claude Pro charge there. Perplexity Pro on top, maybe Gemini bundled into the Google One you already had. Each one lands at around GBP 20 a month. None feels expensive on its own. Three of them is past GBP 600 a year before you touch a power-user tier.

Each subscription feels small. The stack does not.

This post is about one specific saving. Not “use it less.” Not “downgrade.” Just: stop paying for the same thing twice.

01 — There are only a few engines

Strip away the apps and the branding, and modern AI chat runs on a short list of frontier models. OpenAI’s GPT line. Anthropic’s Claude. Google’s Gemini. A few others. That’s most of it.

When you pay for ChatGPT Plus, you are renting one of those engines, wrapped in OpenAI’s interface. Claude Pro rents you a different one, wrapped in Anthropic’s. The interface is theirs. The intelligence underneath is a model that several products license, route to, and resell.

This matters because it reframes the bill. You are not buying a model. You are renting access to one, through a particular front door, and paying again every time you want a different door.

You are not paying for intelligence. You are renting an engine, and there are only a few engines.

02 — Perplexity runs the same engines

Here is the part the comparison guides skip.

Perplexity is not a separate, lesser model competing with the big ones. On its paid tier it is a front end to the same frontier models you already subscribe to. Pro users get a model selector. As of writing, that means the current GPT, Claude, and Gemini families, the same engines behind ChatGPT Plus, Claude Pro, and Gemini, reachable from one subscription. (The very top variants are sometimes held back for the higher Max tier; the mainstream frontier models sit on Pro.)

So if you are paying ChatGPT Plus and Claude Pro and Perplexity Pro for research, you are not buying three intelligences. You are buying the same two or three engines through three separate doors, and paying a door fee each time.

Model line-ups change month to month and the version numbers move with them. Checked June 2026; the principle outlasts the version numbers.

03 — What the separate subscriptions actually buy

To be fair to the direct plans: they are not pure waste. They buy real things, just not the thing the duplication implies.

A native subscription buys you that vendor’s own surface and tooling. ChatGPT’s code execution, image and video generation, voice, custom projects. Claude’s longer documents and artefacts. Gemini’s reach into Google Workspace. Higher message caps. Front-of-queue speed. Clearer guarantees about whether your chats train the model.

That is a genuine list. If you live inside one of those tools all day, for deep coding, image work, or long creative drafting, the native plan earns its place.

But Perplexity is not trying to be those things. It is a research tool: ask a question, get a cited answer, follow the sources. For that job, the job most people actually open AI chat to do, it reaches the same engines the expensive plans do. The honest test is simple. What do you mostly use it for? If the answer is “looking things up and checking them,” you are likely paying a premium for engines you can already reach.

04 — Paying more doesn’t buy you the truth

There is a quiet assumption that a pricier plan buys a more truthful model. It mostly doesn’t.

Hallucination is structurally hard to remove. It shows up in the newest reasoning models, and the vendors’ own evaluations report rates that are far from zero. A Pro or Max badge is not a correctness guarantee. Paid access is not proof.

This is where a citation-first tool earns its keep, not because citations make an answer true, but because they give you something to inspect, challenge, and follow back to source. For due diligence, research, or any claim you’d be embarrassed to get wrong, a workflow you can audit beats a confident paragraph you can’t. That is the case for Perplexity on its merits. It is also, conveniently, the cheapest engine to reach for the reason below.

A confident answer is not a checked one. The badge on the plan doesn’t change that.

05 — The cheapest line item is the one you don’t pay for

Say you’ve decided a citation-first research tool earns a place in your stack. The default move is to hand over the fee and forget it.

Before you do, check whether you already hold it.

Perplexity Pro is a partnership benefit on Revolut’s paid plans, and in the UK, the entry plan costs less than the tool it bundles. Per Revolut’s own pages and current in-app pricing:

  • Premium is GBP 80 a year (GBP 6.67 a month, or GBP 7.99 billed monthly), and includes Perplexity Pro free for up to 12 months for first-time Perplexity customers, on top of a bundle of partner subscriptions and the usual banking features.
  • Metal and Ultra cost more and carry the Perplexity benefit for the life of the plan, rather than capping at a year.
  • Activated with an in-app promo code. The Perplexity perk alone is valued at over 200 USD a year, more than the entire Premium plan that contains it.

Sit with that last line. A banking plan at GBP 80 a year includes, as a throw-in, a research subscription that costs around 200 USD on its own.

A few users have reported wrinkles, including a 24-month promotional cap or needing a card on file to keep access, so treat it as “check and claim,” not “set and forget.” But the shape of it is real: the research tool you were about to pay for may already be sitting inside a banking app you carry. Activate the code and the most useful subscription in your stack drops to zero.

The cheapest subscription is the one already inside something you pay for.

The beginner guides walk you through “free versus paid” as if those are the only two options. The third option is paid, but someone else is footing the bill, and for Perplexity, that someone might be a card already in your pocket.

06 — Where this leaves your stack

Pull it together and the picture gets cheaper without getting worse.

  • The intelligence is a short list of engines. Everyone licenses the same few.
  • Most of the bill is door fees: paying again to reach the same engines through a different interface.
  • Perplexity reaches those engines for research, with citations you can audit, and on Revolut’s paid plans it may cost nothing.
  • Keep a native plan only where you genuinely use that vendor’s own surface: deep coding, generation, the things Perplexity isn’t for.

The problem was never that AI chat is bad. It’s that the costs creep, the value is fuzzy, and nobody hands you the map. Cutting one well-chosen subscription to zero, while losing nothing you actually use, is the easiest win on the list.

If you’re paying for Perplexity Pro out of pocket, check your Revolut plan benefits first. Premium, Metal, and Ultra customers can claim Perplexity Pro through an in-app promo code, subject to eligibility, country availability, and current promotion terms.