The cheapest way to use ChatGPT and Claude together

The short answer

There are four real ways to use Claude and GPT together, and the cheapest one depends on how much you actually use them, not on which route sounds cheapest in the abstract.

• Two direct subscriptions: about $28 a month for ChatGPT Go plus Claude Pro, or about $40 for ChatGPT Plus plus Claude Pro, flat, regardless of usage.
• Free tiers of both, used side by side: $0 a month, with daily or weekly caps that reset and models that step down during busy periods.
• Pay-as-you-go API access through a chat client: no monthly fee, billed per token, so the cost is pennies for light use and can run past $150 a month for heavy use.
• A multi-model subscription that includes both in one plan: one monthly fee, $10.99 on Whizi's entry plan, against $20 for either provider's own standard plan.

A fifth thing shows up on page one of the search results for this exact question, and it is not a real option: paying a stranger for a shared or resold ChatGPT Plus or Claude Pro login. That breaks both providers' terms of service, so it is covered plainly further down rather than counted as a fifth real route.

Route 1: two direct subscriptions

The obvious route is also the easiest to price, and most articles on this question price it wrong by assuming ChatGPT Plus. There are two paid ChatGPT tiers. As of August 2026, ChatGPT Go is $8 a month in the US and ChatGPT Plus is $20 a month, while Claude Pro is $20 a month, or $17 a month if you pay annually (Anthropic bills that as $200 up front). So the cheapest pairing of two direct subscriptions is Go plus Claude Pro at about $28 a month, or about $25 if you pay Claude annually. ChatGPT Plus with Claude Pro is $40 a month, or $37 with Claude annual, since OpenAI does not currently list a discounted annual rate for Plus.

Go is a capped tier rather than a smaller Plus: more uploads and images than the free plan, and everyday text chat that OpenAI's pricing page lists as unlimited on both, but not the deep research and agent style work Plus is bought for, and it can carry ads in a growing list of markets. Price the $28 pairing first and move up to $40 only if you can name the Plus feature you need. Two more caveats on those figures. OpenAI took Go worldwide in January 2026 and prices it locally outside the US, and Claude subscriptions are localized in many markets too, so the number at checkout may not be the dollar figure here. And both services are country gated: ChatGPT supported countries and Claude supported countries are the lists that decide whether you can subscribe at all. If your country is not on them, that is a location limit rather than a payment problem, and no card fixes it.

What the money buys you is not usage. It buys you access, at whatever volume the provider considers reasonable for one person, inside two completely separate products. You get two logins, two histories, two apps, and no way to ask GPT to critique something Claude just wrote without copying the text yourself. If you already juggle more tools than these two, ai subscription costs has a worksheet for finding out what your whole stack actually adds up to.

This route is the right one when your usage is heavy and steady, because the price does not move whether you send fifty messages a month or five thousand. It is the wrong one if your actual usage is light, because you are paying a flat fee for capacity you are not using, and it stops being obviously right the moment a cheaper metered option can cover the same volume for less. The next two sections cover exactly that case.

Route 2: free tiers of both, used together

Both companies give away a genuinely usable free tier. ChatGPT's free plan and Claude's free plan both let you send messages to a capable model at no cost, and running them side by side costs nothing.

The catch is the same on both sides, and it is a mechanism rather than a fixed number: free tiers cap how much you can send in a given window, typically resetting every few hours or every day, and during busy periods some free plans quietly route you to a smaller, faster model instead of the flagship one. Those caps and reset windows move often enough that a specific figure printed here would be wrong within a few months, so check the current limits on each provider's own help page before you plan around them: OpenAI Help Center and Anthropic Help Center both keep this current.

This route is genuinely the cheapest one that exists, and it is the right answer for a real slice of readers: anyone whose actual usage is a handful of questions a week, comparing an occasional answer between the two, well under whatever the current caps are. It stops being the right answer the moment you hit the reset wall mid-task, because a free tier gives you no way to buy more room for that one busy week without upgrading the whole month.

Route 3: pay-as-you-go API access

The route almost nobody tries, because it sounds technical and mostly is not. Both OpenAI and Anthropic sell direct API access billed per token, with no monthly subscription fee. You need a client to talk to it, since the raw API has no chat window of its own: OpenAI's own developer platform and Anthropic's own developer console both work as a starting point, and several chat interfaces let you paste in your own API key and talk to both providers from one screen without a subscription to either. The usual names are TypingMind, a paid web app you buy a licence for, LibreChat, a free open source app you host yourself, and Chatbox, a desktop and mobile client with a free tier. All three accept an OpenAI key and an Anthropic key side by side, so the choice is mostly about whether you would rather pay once, self host, or install an app.

Anthropic's published API pricing as of August 2026: the small, fast Claude model runs $1 per million input tokens and $5 per million output tokens; the mid-tier Claude model most people reach for runs $2 in and $10 out per million tokens; the most expensive Claude model most people would consider runs $5 in and $25 out, and Anthropic lists specialist models above that. OpenAI's published API pricing over the same period: its smallest model runs $0.05 in and $0.40 out per million tokens; a smaller general-purpose model runs $0.25 in and $2 out; its flagship model runs $5 in and $30 out. A million tokens is roughly 750,000 words, so most single conversations use a tiny fraction of one.

Three numbers, worked through for a light, medium, and heavy user, using those published rates and the mid-tier model on each side unless noted. Treat these as an illustration of the mechanism rather than a promise about your own bill, since the real number depends on which model you pick and how long your conversations run.

User	Assumption	GPT side	Claude side	Total
Light	About 50,000 tokens a month total, a few short exchanges a week	Under $0.03	Under $0.20	Under $0.25 a month
Medium	About 2,000,000 tokens a month in total, daily use with some pasted context	About $1.10	About $6.00	Roughly $7 a month
Heavy	About 20,000,000 tokens a month in total on the flagship model, split evenly between the two, with long documents and extended sessions	About $175	About $150	Roughly $325 a month

One mechanism matters more than any single number here: a back-and-forth conversation resends the whole thread on every turn unless your client caches it, so a long conversation burns through tokens far faster than the same total words spread across short, independent questions. Two things drive the heavy row above, then, and it is worth keeping them apart: the token count itself, and the flagship rate, which is several times the mid-tier one. That is why anyone doing sustained daily work should watch the running total rather than trust a monthly estimate made in advance. Most API clients show you the running cost per conversation, so check it against the number here instead of taking it on faith.

This route wins clearly for light and medium use, where a $7 month beats even the $28 Go pairing and, for the lightest users, comes close to the free tier while removing the reset-window ceiling. It stops winning once usage gets heavy enough that a flat subscription is cheaper than the metered total. On these rates that crossover sits at roughly 8,000,000 mid-tier tokens a month against the $28 pairing, and roughly 11,000,000 against the $40 one, both well inside the gap between the medium and heavy rows above.

Route 4: a multi-model subscription

The fourth route is a single subscription that includes both GPT and Claude models in one plan, which is what Whizi is. It exists for the same reason one subscription for all AI models explains at more length: providers price by seat, not by task, and nobody bundles a competitor's model into their own app, so a third product has to do the bundling.

Whizi's Starter plan is $10.99 a month and includes GPT alongside a Claude model in the same workspace. That is above the $8 of ChatGPT Go on its own and below the $20 of either ChatGPT Plus or Claude Pro, against $28 to $40 for running two direct subscriptions. Higher Whizi plans add Claude's larger models and more monthly messages, and they range from below the $28 pairing to above it, so price the tier you actually need rather than assuming the whole ladder undercuts two direct subscriptions. Prices and message limits move, so check pricing before you commit either way, and run your own numbers through the savings calculator if you are also paying for other AI tools.

This route is the right answer for the medium user who wants the convenience of a normal chat app, a shared history between models, and the ability to switch models mid-conversation, none of which the API route gives you without building it yourself. How to use multiple AI models together covers what that switching is actually good for beyond convenience: drafting in one model and asking a different one to find the flaw is a workflow the two separate direct subscriptions cannot do at any price, because nothing connects them.

The route to skip: account sharing

Search results for this exact question are full of sellers offering a shared or resold ChatGPT Plus or Claude Pro login, sometimes bundled with a foreign phone number or a prepaid card, at a price below what either provider charges directly. It is worth naming plainly why this is not a real option rather than a cheap one.

Sharing a paid account violates both OpenAI's and Anthropic's terms of service, and both sets of terms reserve the right to suspend or terminate an account for that breach, at the provider's discretion and without warning. Neither company publishes how it enforces this, so treat suspension as a risk you are carrying rather than a certainty either way. If it happens you lose access with no notice and no refund, and you were never the accountholder, so you have no standing to dispute it. Paying a third party for login credentials also means handing a stranger a live session tied to your payment method or a card they control, which is a real exposure with no upside if the arrangement collapses, which these arrangements routinely do.

None of the four routes above require breaking either provider's terms, and all four are genuinely available to anyone with a card or, for the free tiers, nothing at all. If a service you are looking at cannot say plainly that you get your own account, it is not a cheaper version of one of these four routes. It is a different, riskier thing wearing the same price tag.

The one-week test that picks your route

The one-week test settles this faster than more reading will. Track how many real exchanges you send to each model over seven normal days, note roughly how long the conversations run, and multiply by four for a rough month. Under a few hundred short exchanges a month, free tiers or the API route are genuinely cheapest. Daily use with some longer sessions is where a multi-model subscription usually beats both a two-subscription stack and an API bill that has started climbing. Sustained heavy use, especially long documents and extended sessions every day, is where a flat plan, whether that is two direct subscriptions or a higher multi-model tier, stops looking expensive and starts looking like the only option that does not require watching a running total.