You ask ChatGPT a question. It answers with total confidence. You paste that answer into an email, a report, or a decision. Then someone points out it was wrong. Cuey is a free Chrome extension built for the moment right before that happens: it runs your question past other AI models and shows you where they disagree.
Cuey sits inside the AI tool you already use, sends your prompt to other models in the background, and puts the results in a sidebar. Here is what it does, how to set it up in about a minute, a simple rule for reading the results, and the limits you should know before you trust it.
What Cuey Actually Does
Most people who care about accuracy already do this by hand. They ask ChatGPT, open Claude in another tab, paste the same question, then open Gemini and do it again. It works. It is also tedious enough that most of us skip it.
Cuey automates that loop. According to the Chrome Web Store listing, it compares your AI’s answer against ChatGPT, Claude, Gemini and Grok, then shows what the models agree on, where they disagree, and what your model missed. A marketing lead on the team described it on Product Hunt as sending your prompt to three other models in the background to see whether any of them adds something your main model did not.
The key features, as listed:
- Works inside your AI tool. No separate app. You keep using ChatGPT, Claude or Gemini as usual.
- Side by side sidebar. Responses from different models sit next to each other, so you can see divergence at a glance.
- Cross-checks against 30+ models. The store listing says this comes with a daily free limit.
- Portable memory. You can import chat history and memories from ChatGPT, Claude and Gemini and carry that context across models.
- No API keys. There is nothing to configure, and the listing says no account is needed to start.
Why a Second Opinion Matters
Here’s the thing about AI mistakes: they rarely look like mistakes. A wrong answer reads exactly like a right one.
OpenAI researchers published a paper in September 2025 arguing that language models hallucinate partly because training and evaluation reward guessing over admitting uncertainty. Think of a student who never leaves an exam question blank, because a guess scores better than silence. OpenAI’s own write-up of the research says hallucinations remain a hard problem for every large language model, and the full paper on arXiv lays out the reasoning.
What this really means for you: a single model’s confidence tells you very little about whether it is right. A disagreement between models tells you something concrete. It tells you where to look harder.
Cuey at a Glance
| Detail | What the listing shows |
|---|---|
| Publisher | Llama Valley Inc |
| Price | Free to start, no account required. Paid plan available |
| Rating | 4.8 from 12 ratings |
| Users | About 2,000 |
| Version | 0.1.20.13, updated October 5, 2026 |
| Size | 8.91 MiB |
| Languages | 8, including English, Spanish, French, German, Italian, Portuguese (Brazil), Chinese and Japanese |
| Data | Handles website content. Developer states it does not sell your data |
Read that table with a straight face. 2,000 users and 12 ratings is a young product. A 4.8 from 12 people is a good sign, not proof.
How to Set Up Cuey (Step by Step)
- Open the Cuey listing in Chrome and click Add to Chrome.
- Read the permission prompt before you accept. Google’s own security guidance for extensions says to compare what an extension claims to do with the permissions it requests and the privacy practices it publishes. Cuey reads page content on AI sites, which fits its purpose. Anything beyond that would be a red flag.
- Pin the extension. Click the puzzle piece icon in Chrome’s toolbar, then the pin next to Cuey, so the sidebar icon is always one click away.
- Open your usual AI tool. ChatGPT, Claude or Gemini all work, according to the listing.
- Type your prompt as normal. Cuey runs it across your selected models in the background.
- Click the Cuey icon to open the sidebar. You will see where the models agree, where they disagree, and what your main model left out.
- Optional: import your memory. If you want your context to follow you between tools, use the import option for ChatGPT, Claude or Gemini history.
Google’s Chrome security blog also notes that less than 1% of Chrome Web Store installs in 2024 were found to include malware. Good odds, but not a reason to skip step two.
The 30 Second Reading Rule
A comparison sidebar is only useful if you know what to do with it. Here is a simple routine you can start using today.
- All models agree. Proceed, but still check any number, date, or name against a primary source if the stakes are real. Agreement is a good sign. It is not a guarantee, because models can share the same blind spots.
- Models disagree on a fact. Stop. Ask each model for its source, then check the source yourself. The disagreement just told you exactly which sentence to verify.
- One model adds something the others missed. Read that part first. This is often where the value is, such as a caveat, an exception, or a step you forgot.
Where this routine pays off fastest:
- Anything with money, health, or legal consequences. Ask the question once, compare, then verify with an official source.
- Statistics you plan to quote. Models love a precise number. Disagreement on the number is a loud warning.
- Important emails and proposals. Compare tone and structure across models, then pick the draft that sounds like you.
- Code you are about to ship. If two models flag a bug the third ignored, you found your review list.
Pricing
The listing says side by side comparison, cross-checking, and multi language support are free, with a daily free limit on cross-checks. The pricing page describes two plans, Free and Pro. Pro adds more daily comparisons, priority access and 500MB of file storage, and every plan includes access to all models.
One thing to flag: the pricing page did not show a dollar figure or the exact free daily limit when I checked. The Chrome listing also says the extension offers in-app purchases. Check the live page before you assume anything about cost.
The Honest Limitations
- Agreement is not accuracy. Several models can repeat the same popular mistake. Treat consensus as a signal, not a verdict.
- Your prompt goes to other providers. That is how the tool works. Do not paste confidential contracts, client data, or anything under an NDA into a prompt you are cross-checking.
- The privacy claims are the company’s own. Directories such as Aixploria repeat Cuey’s pitch that sensitive data is encrypted on your device and prompts are not logged. When I fetched the privacy policy page, it showed only a short summary line, so I could not verify those details. Read the full policy yourself.
- The model count is inconsistent. The Chrome listing says 30+ models, while the pricing page says 20+. Not a dealbreaker, but worth knowing.
- It is an early product. Version 0.1.x, about 2,000 users, 12 ratings. Expect rough edges and changing limits.
- I have not run a lab test. This review is based on the Chrome listing, Cuey’s own pages, and independent directory coverage. Test it on a few of your own questions before you rely on it.
Alternatives Worth Knowing
- The manual method. Three tabs, one question, pasted three times. Free, slow, and it works. Still the best option for anything sensitive, since you control exactly where each prompt goes.
- MultiLLM. Another Chrome extension that sends one prompt to ChatGPT, Claude and Gemini and shows replies side by side, with a free tier. The difference is that it works as its own interface rather than inside the AI tool you already have open.
The Bottom Line
Cuey does one job: it makes the second opinion cheap enough that you will actually get one. If you use AI for work that other people read, act on, or pay for, that is worth a few minutes to install and test.
Just keep your expectations right. It will not make an answer true. It will show you where an answer is shaky, and that is where your attention should go. I covered another side of the trust question in a recent post on how ChatGPT ads are changing, and the lesson is the same: the more you rely on one AI, the more it pays to double check it.
Know someone who pastes AI answers straight into client emails? Send them this post before it costs them. And tell me in the comments: what is the worst confident wrong answer an AI ever gave you?
Sources and further reading
- Chrome Web Store, Cuey listing by Llama Valley Inc.
- Cuey, Homepage, Pricing, Models.
- Product Hunt, Cuey launch page.
- OpenAI, Why language models hallucinate.
- Kalai, Nachum, Vempala and Zhang, Why Language Models Hallucinate (arXiv).
- Google Security Blog, Staying safe with Chrome extensions.
- Aixploria, Cuey directory entry.
- Extension Auditor, MultiLLM listing.
Leave a Reply