CoreAI vs ChatHub: Best Way to Compare AI Models?

Somewhere around 300,000 people have installed ChatHub to do one thing: type a prompt once and watch several AI models answer it side by side. It is a genuinely good idea — so good that it stopped being a niche extension trick and became a feature category. This CoreAI vs ChatHub comparison looks at the original side-by-side specialist against a full multi-model app that bakes comparison in as one feature among many. Both let you line up GPT, Claude, and Gemini answers in columns. The differences are where you can do it, how many models you can reach, and what happens after you have picked a winner.

What ChatHub Gets Right

ChatHub started as an open-source Chrome extension and grew into one of the most popular multi-model chat tools anywhere, with a 4.7-star rating on the Chrome Web Store and hundreds of thousands of users. The core experience is exactly what it promises on chathub.gg: a split-screen layout where one prompt fans out to up to six models — GPT-5, Claude 4.5, Gemini 3, DeepSeek, and 20+ others — and their answers stream in simultaneously.

The free tier lets you run two models side by side, which is enough to feel the magic. Paid plans add more columns and remove caps: Pro is $14.99 per month and Unlimited is $24.99 per month, both billed annually, and the paid tiers include image generation and document uploads. For a prompt-testing power user on a desktop, that is a fair deal.

What ChatHub is not is a full workspace. It grew up as a comparison surface, and most of its gravity still sits in the browser on a desktop machine. The model list is a curated shortlist of the famous names, not a deep catalog — fine for comparing flagships, limiting when the model you want to test is a budget Chinese reasoning model or a niche coding specialist.

How CoreAI Approaches Comparison

CoreAI treats side-by-side comparison as one room in a bigger house. The Compare view — available on paid plans — runs your prompt across multiple models in parallel on mobile and web, with expandable cards for reading long answers properly. The difference is what surrounds it: a catalog of 326 chat models spanning every major family, from the GPT-5.6 tier and Claude Sonnet 5 to Kimi K3, Grok 4.5, GLM 5.2, and dozens of budget-friendly options that never make it into curated shortlists.

That catalog depth changes what comparison is for. On ChatHub you mostly referee the famous five. On CoreAI you can ask sharper questions: does a budget reasoning model handle my support emails as well as a premium one at a fraction of the usage? Does Claude Sonnet 5's million-token context actually beat Gemini 3.5 Flash on my long documents? We wrote a full method for this in how to compare AI models with your own prompts — the short version is that your prompts, not benchmarks, should pick your model.

And when the comparison is done, you stay in the same app to do the actual work: file attachments, vision, image generation, web search with citations, thinking mode, synced history, plus 74 free AI tools for everything from PDF chat to SQL generation. Comparison is the tryout; CoreAI also owns the season.

CoreAI vs ChatHub: Feature and Pricing Table

Is ChatHub Still the Best Comparison Tool in 2026?

For pure desktop prompt-racing on a budget, ChatHub remains excellent. Six simultaneous columns is more parallel output than most people can even read, the interface is polished, and $14.99 a month is a reasonable price for a dedicated instrument. If your entire use case is "which flagship answers this better," ChatHub does the job with no wasted motion.

The cracks appear at the edges of that use case. The 20-model shortlist means the most interesting comparisons of 2026 — premium flagships against the budget reasoning models that undercut them — often cannot happen there. And a comparison tool that stays on your desktop cannot help when the question occurs to you in line at the airport.

There is also a quieter issue: a dedicated comparison tool earns its subscription only on the days you compare. Most weeks you are not running bake-offs; you are just working with the model that already won. A standalone $14.99 comparison instrument sits idle on those days, while a full app keeps earning its fee through ordinary chats, attachments, and tools. That does not make ChatHub bad — it makes it a specialist, and specialists are worth paying for exactly as often as you need the specialty.

What a Real Comparison Workflow Looks Like

Here is how model comparison actually pays off, whichever tool you use. First, collect five prompts from your real work — not trivia, your actual emails, briefs, or code. Second, run them across a flagship pair and a budget challenger: Claude Sonnet 5 against GPT-5.6 for writing, or KAT-Coder-Pro V2.5 against Kimi K2.7 Code for programming, with something like Tencent's budget Hy3 as the spoiler. Third, score the answers on your own taste, not a leaderboard's. Fourth — and this is the step people skip — actually move your daily work to the winner.

ChatHub handles steps one through three beautifully, on a desktop, for the models on its list. Where it stops is step four and everywhere without a keyboard: the winner of your bake-off lives in one app, your ongoing work in another, and your phone in neither. CoreAI runs the same loop end to end — Compare for the bake-off, then the same app, same history, same attachments for everything after, on whichever device is in your hand. The workflow difference sounds small in a paragraph and feels enormous by week two.

Which One Should You Pick?

Pick ChatHub if comparing famous models on a desktop is the whole job and you want the cheapest polished tool for it. It earned its reputation honestly.

Pick CoreAI if comparison is how you choose, not what you do. The 300-model catalog makes the comparisons more interesting, the native apps make them available everywhere, and the surrounding workspace means the winning model is one tap from real work. There is a free tier to test the fit, and paid plans start at $57 per month — more than ChatHub, in exchange for a far bigger catalog and everything around it.

The cheapest possible test costs nothing: run the same three prompts through ChatHub's free two-model view and through CoreAI's free tier on your phone this week. Note which tool you were still opening on Friday. Comparison tools, fittingly, are best chosen by comparison.

Frequently Asked Questions

Is ChatHub free to use?

ChatHub has a free tier that lets you compare two AI models side by side with basic prompt management. Paid plans — Pro at $14.99/month and Unlimited at $24.99/month on annual billing — unlock up to six simultaneous models, image generation, and document uploads.

How many models can CoreAI compare side by side?

CoreAI's Compare view runs multiple models in parallel on both mobile and web, drawing from a catalog of 326 chat models. Compare is available on paid plans, and the results appear as expandable cards so long answers stay readable.

Does ChatHub work on mobile?

ChatHub is strongest as a desktop browser tool, which is where it was born and where its split-screen layout makes sense. CoreAI ships native iOS and Android apps plus a web app, with chat history synced across all of them.

Why compare AI models at all instead of just using one?

Because models differ wildly by task, and pricing differs even more. A budget reasoning model often matches a flagship on routine work. Running your own prompts across models — not reading benchmarks — is the only reliable way to find out which one deserves your daily use.