Cheapest Way to Use GPT-5 and Claude Together
Do not pay $40 a month for two plans. Get GPT-5 and Claude Opus 4.6 in one app from $20.99, and switch between them mid-conversation.
The cheapest way to use GPT-5 and Claude together is one app that includes both, instead of buying two separate subscriptions. MultiChats gives you GPT-5 and Claude Opus 4.6 (plus 50+ other models) from $20.99 a month, roughly half of what you would pay for ChatGPT Plus and Claude Pro side by side. You can even switch between the two models in the middle of a single conversation without losing context.
Short answer: one app, about half the cost
If you want regular access to both GPT-5 and Claude, two standalone plans is the expensive route. The default move people make is paying for ChatGPT Plus to get GPT-5, then paying again for Claude Pro to get Claude Opus. That works, but you end up with two apps, two logins, two bills, and no easy way to move a conversation from one model to the other.
A bundled app fixes the cost and the friction at the same time. With MultiChats Pro at $20.99 a month, GPT-5 and Claude both live behind one subscription, alongside Gemini, Grok, Mistral, Perplexity, and dozens more. You pick the right model per message and keep the same thread. For most people who use both models more than occasionally, that is the cheapest reliable way to get there.
The math: two plans vs one bundle
Here is the simple version. Premium plans from the big AI labs usually sit around $20 a month each. Stack two of them and you are paying roughly $40 a month for the privilege of using two models that do not talk to each other.
Option | What you get | Monthly cost |
|---|---|---|
Two standalone plans | GPT-5 and Claude, two separate apps | around $40 |
MultiChats Pro | GPT-5, Claude Opus 4.6, and 50+ more in one app | $20.99 |
MultiChats Pro (yearly) | Same access, billed annually | $199.99/yr (about $16.67/mo) |
Over a year the gap is hard to ignore. Two plans run you roughly $480. MultiChats Pro is $251.88 if you pay monthly, or $199.99 up front for the year, which works out to about $16.67 a month. You are getting both models you wanted, plus a whole shelf of others, for less than the price of one.
If you need more headroom, there is also a Pro+ tier at $34.99 a month (or $349.99/year) that adds batch image generation, video uploads and analysis, the fastest response times, and conversation summarization. Even that sits below the cost of two separate premium plans. For a wider breakdown, see the real cost of using all the AI models.
How to use both in one place
The cost savings are the headline, but the workflow is the part people end up liking most. GPT-5 and Claude have different strengths. GPT-5 tends to be quick and confident for drafts, brainstorming, and structured output. Claude Opus tends to shine on long-form writing, nuance, and careful reasoning. When both live in the same chat, you can lean on each one where it is strongest.
A typical flow looks like this:
Ask GPT-5 for a fast first draft or an outline.
Switch to Claude Opus 4.6 in the same thread to refine the tone and tighten the argument.
Switch back to GPT-5 to check facts or generate variations.
The thread carries its full context across every switch, so you never have to copy and paste between two apps or re-explain what you are working on. Here is how switching AI models mid-conversation actually works in practice. If you mainly came for GPT-5, you can also read how to use GPT-5 without ChatGPT Plus.
MultiChats Pro also bundles the things you would otherwise miss by hopping between apps: real-time web search, reading any webpage by URL, inline image generation, saved memories with per-folder customization, folders to organize chats, private per-chat notes on web, and voice messages and calls on mobile. One plan, one workspace, no silent model downgrades behind your back.
Free ways to try GPT-5 and Claude (honest, with limits)
If your needs are light, you may not need to pay anyone yet. There are honest free options, and it is worth knowing where they stop.
Most AI labs offer a free tier with daily caps and the smaller versions of their models. Good for a quick question, frustrating for steady daily work.
MultiChats Free is $0 and includes 5 free models (GPT-5.4 Nano, Gemini 3.1 Flash Lite, Mistral Small 3.2, and more), with limited messages per day, limited uploads, and 2 image generations a month.
Free tiers do not include the flagship GPT-5 and Claude Opus models, web search, memories, folders, URL reading, or voice. Those sit on Pro.
Being straight about it: if you only touch AI a couple of times a week, a free tier or a single tool like ChatGPT alone might be all you need, and that is fine. The moment you want both GPT-5 and Claude regularly, without rate-limit headaches, a single bundled plan is the cheapest dependable route. If you would rather pick a primary tool first, our roundup of the best AI chat apps and the ChatGPT vs Claude comparison both help you decide before you spend anything.
Frequently asked questions
Can I get GPT-5 and Claude without two subscriptions?
Yes. MultiChats includes both GPT-5 and Claude Opus 4.6 on a single subscription starting at $20.99 a month, so you skip the second bill and the second app entirely.
Is it cheaper than ChatGPT Plus plus Claude Pro?
In most cases, yes, roughly half the price. Two standalone premium plans land around $40 a month combined. MultiChats Pro is $20.99 a month and also throws in Gemini, Grok, Mistral, Perplexity, and 50+ models total.
Can I switch between GPT-5 and Claude in one chat?
Yes. You choose a model per message, and the conversation context carries across both, so you can draft with one and refine with the other in the same thread.
Is there a free way to try both first?
You can start on MultiChats Free with 5 models at no cost to get a feel for the app, though the flagship GPT-5 and Claude Opus models live on Pro. Most labs also offer limited free tiers with daily caps if you want to sample them directly.
What happens to my data?
MultiChats does not train on your conversations and does not run ads. If that matters to you, here is more on an AI app that does not train on your data.
The bottom line
Paying for two plans to use GPT-5 and Claude is the costly habit most people fall into by default. One bundled app does the same job for about half, keeps both models in a single thread, and hands you 50+ others on top. If that sounds like the setup you want, take a look at MultiChats pricing and get both for less. You can also try MultiChats on web, iOS, or Android first.