Cheapest multi-model AI chat: one $15 seat, not three subscriptions
The cheapest multi-model AI chat is rarely the lowest token price. It is the seat that replaces ChatGPT Plus, Claude Pro, and a Gemini plan without making you re-paste the brief.
Cheapest multi-model AI chat is a money question wearing a product question. The honest comparison is not “lowest price on a model directory.” It is what you pay to use more than one lab in a normal week without opening three billing pages.
zy.ai Pro is $15/mo for Claude, GPT, Gemini, and Grok as listed in one chat. Free is $0 after an account, on free models, with a daily cap. Neither number is a promise that every API token on earth is cheaper here.
What “cheap” usually ignores
- ChatGPT Plus is commonly about $20/mo and OpenAI-only
- Claude Pro is commonly about $20/mo and Anthropic-only
- A paid Gemini plan is a third seat, for Google’s models
- The week that uses two of those is already about $40 before the third invoice
$15 is not magic. It is one seat instead of a stack. If you only ever use one lab, the cheapest plan is that lab’s free tier or that lab’s single subscription.
The ladder on zy.ai
- Free: account, no card. Gemini 2.5 Flash, Llama 3.3 70B, Qwen2.5 Coder, DeepSeek V4 Flash. Daily cap. Frontier models stay on Pro.
- Pro $15/mo: frontier labs in the same thread. The first month is shown as 40% off a $25 list; you pay $15. Then $15.
- Ultra $45/mo: Voice, business research agents, higher capacity. The first month is shown as 40% off $75; you pay $45. Then $45.
Full table: pricing. When to leave Free: free AI chat vs Pro.
When $15 is actually the cheap option
- You already pay for two chat apps, or you are about to
- You paste the same spec into Claude and GPT
- You want Gemini 2.5 Flash for volume and a frontier model for the hard turn
- A team should standardize on one surface. See one subscription, many models.
Compare the single-lab seats directly: ChatGPT Plus alternative, Claude alternative, Gemini alternative, Grok alternative.
When a stack or an API is cheaper
- You use one lab and you are happy. Do not buy a second product to save a theoretical $5.
- You ship software and pay per token. A router such as OpenRouter can cost less than a seat if volume is low or spiky. That is a different product: OpenRouter alternative.
- You need ChatGPT-only or Claude-only app features. Those are not included because the logo is.
How to test the price without a card
- Create a free account on zyai.org. Chat requires sign-in.
- Run this week’s real prompt on a free model.
- If the answer is good enough, stay on Free. That is the cheapest plan.
- If you switch models more than once a week, Pro at $15 is the number to compare against two ~$20 seats.
The evaluation checklist for the workspace itself is best multi-model AI chat. Why zy.ai is the short product note.
Honest limit
Lab list prices move. We cite ChatGPT Plus and Claude Pro as commonly about $20 so the comparison is concrete, and we do not invent a current Gemini invoice. zy.ai prices here are the product prices: Free $0, Pro $15, Ultra $45. The picker, not this page, decides which model name is on your plan today.
One seat. Switch models when the work changes.
Free account, no card. Pro $15 if you would otherwise pay for two labs.