How to Use Multiple AI Models Without Paying for Three Subscriptions

The people who get the most out of AI don't use one model. They use Claude to write, a frontier model to reason through hard problems, and a fast cheap model for everyday questions. The problem: paying for all of them separately gets expensive fast.

Draft · Claudethorough, flags a risk
Draft · GPTconcise, strong structure
Draft · Geminiadds a source
The merged answer: agreement kept, mistakes dropped — and where the three genuinely disagreed, it says so instead of guessing.
 fused from 3 models

The real cost of "just subscribe to each"

The major consumer plans all land around $20/month:

• ChatGPT Plus — ~$20
• Claude Pro — ~$20
• Gemini / Perplexity Pro — ~$20

Stack three and you're at ~$60/month — before you've added an image generator. You're also juggling three tabs, three logins, and three separate memories that never talk to each other.

Option 1: DIY tab-juggling (free but painful)

You can keep free tiers of each open and copy-paste between them. It works, but you become the router — deciding which model to use, re-pasting context, and re-explaining yourself every time you switch. Reviewers who test AI daily recommend using models together; almost none enjoy the manual switching.

Option 2: a single multi-model app

Aggregators put many models behind one subscription. 1Chat is one of them — every top model in one chat — but it adds the two things tab-juggling can't:

• A shared memory. Teach it once; every model knows it. Your context doesn't reset when you switch.
• A router that picks for you. Auto chooses the right model per question; Fusion has three flagships answer as one. No copy-pasting.

The math

One 1Chat subscription replaces the ~$60/month three-subscription stack, and there's a free plan (a handful of messages a day on fast models) to start with no card. You get more models than any single plan gives you, one memory across all of them, and one bill.

If you already use more than one AI, you're almost certainly overpaying — in dollars and in busywork. One chat, every model, one memory is the cheaper and faster way to do it.