Chub AI Guide 2026: Features, Pricing & CAI Comparison

Heard the name Chub AI floating around Reddit and wondered what it actually is? You're not alone. Thousands of people search for chubai every month, and most want the same three answers: what the platform does, whether it's free, and how it compares to Character.AI and JanitorAI. This guide covers all of that in plain English. We'll walk through AI character cards, the models that power your chats, real 2026 pricing, and the content rules nobody explains clearly. We'll also fix the most common errors, from empty replies to bots suddenly speaking Chinese. By the end, you'll know exactly whether this AI roleplay platform deserves a spot in your bookmarks.

What Is Chub AI?

Chub AI (found at Chub.ai) is a community-driven hub for AI character cards plus a chat platform for AI roleplay. Think of it as a giant public library of custom AI characters. You pick a character, choose an AI model, and start chatting instantly.

The platform grew from two older projects: CharacterHub and VenusAI. They merged into what many users now call Chub Venus. It became popular fast, especially with people leaving stricter platforms. Today it hosts over 60,000 user-created characters and millions of monthly visitors.

What Are Character Cards on Chub AI?

A character card is a small portable file holding everything about a character. That includes personality, greeting message, example dialogue, and lorebooks. Most cards use the TavernAI V2 character cards format. Because the format is open, you can import character cards into other apps freely.

How Does Chub AI Work?

Getting started is simple. You sign up with email, Google, Apple, or GitHub. Then you browse the card library using tag filtering and search. Found a character you like? Hit chat. You can also set up personas, which tell the AI who you are.

Here's the clever part. The site is really a roleplay frontend. It connects to many AI brains. You can use Chub's own models, or plug in an outside service through an API connection. That flexibility is the platform's biggest selling point over rivals.

Using ChubAI With SillyTavern

Many power users export cards from chubai into SillyTavern, a popular local chat app. The community even built tools like the chub charlink scraper, a bookmarklet for character link export in bulk. Pair that with local LLMs and you get a fully private offline interface.

Supported AI Models on Chub.ai

The platform supports its native models, like the famous Soji, plus outside options. With your own API key, you can connect OpenAI, Claude, KoboldAI, and NovelAI. Users also discuss community models like GLM 4.5. More choice means more control over chat quality.

Chub AI vs Character.AI vs Janitor AI

This is the question everyone asks. How does it stack up against Character.AI (CAI) and JanitorAI? The short answer: Chub trades polish for freedom. CAI is bigger and smoother. JAI sits in the middle. Chub gives you the most control by far.

For context, Character.AI pulls about 180 million monthly visits, dwarfing Chub's 7 to 14 million. But size isn't everything. Card export, prompt engineering options, and model choice all favor the smaller platform. Here's a side-by-side look:

FeatureChub AICharacter.AIJanitor AIContent FiltersLight, tag-basedStrict NSFW filterIn betweenCard ExportFull export allowedNot permittedPartialCustom API KeysYesNoPartialModel ChoiceMany modelsOne in-house modelLimitedEntry PricingFree or $5/month$9.99/monthFree tier available

Which Platform Is Best for AI Roleplay?

It depends on you. Want a polished, safe AI chatbot experience? Pick CAI. Want simple roleplay AI with some freedom? Try SpicyChat AI or Agnai.chat. Want total control, group chats, and an unfiltered AI chat option? ChubAI wins, hands down.

Key Features of Chub AI

The card library is the star. Tens of thousands of searchable characters, sorted with tag filtering. You can build a character creator profile, save multiple personas, and run group chats with several characters at once. There's even text-to-speech on higher plans.

Lorebooks deserve a special shout-out. They store world facts that trigger when keywords appear in chat. One experienced reviewer found that a well-built lorebook matters more for memory than raw model size. Smart prompt engineering beats brute force here.

The Soji Model Explained

Soji is Chub's flagship in-house model, a 671B giant with a 30K context window on the Mars plan. It handles long, complex stories well. However, some users report quirks, like characters repeating responses. We'll cover fixes for that below.

Is Chub AI Free? Pricing and Subscription Tiers

Yes, there's a genuine Chub AI free tier. Free users get testing-ground models, full create character cards tools, and chat export. The catch? Free user limits apply, and free models rotate. The free tier acts as a testing ground for future paid models.

Now the Chub AI pricing details. The Mercury tier costs $5 monthly and the Mars tier costs $20 monthly. One important catch: billing happens in four-month blocks, so you pay roughly $20 or $80 upfront.

PlanPriceKey Models IncludedFree$0Rotating test models + full creation toolsMercury$5/monthMythoMax 13B, Mistral 7B, 8K memoryMars$20/monthSoji 671B, Asha 70B, Mixtral, voice features

A fun case study from the community: many veterans say MythoMax 13B on cheap Mercury stays more consistent than heavier models for everyday scenes. Bigger isn't always better. That's the "GLM 4.5 free" confusion too — test models come and go, which surprises free users.

Does Chub AI Allow NSFW Content?

This question fills Reddit threads, so let's be factual. The platform permits mature content for adults, with far lighter content moderation than CAI. There's no blanket NSFW filter on text. However, your connected model matters. OpenAI keys keep OpenAI's own filters.

There are firm rules, though. Registration requires users to be 18 or older, with age verification before full access. Content involving minors is banned outright and removed by moderators. Image rules are stricter than text rules. So "uncensored" doesn't mean "anything goes."

Common Chub AI Problems and Fixes

Chub AI Not Working or Can't Chat

Seeing Chub AI not working errors? First, check if the site is down for everyone, not just you. Searches for "is Chub AI down" spike during outages. Otherwise, clear your browser cache, log out and back in, and disable VPNs or aggressive ad blockers.

Empty Response From API

An empty response from API usually means one of two things. Either you hit free tier limits, or you're using a Mars model on a Mercury subscription. Check your plan, switch to an included model, and regenerate. Broken card definitions can also cause silence.

Bots Speaking in Chinese

Yes, bots speaking in Chinese is a real glitch. It happens when a model's token sampling goes haywire, often on experimental free models. The fix is simple. Regenerate the message, lower the temperature setting, or swap to a different model. The problem usually vanishes immediately.

Characters Repeating Responses

Annoyed by characters repeating responses or echoing your words back? This is a known Soji quirk. Try raising the repetition penalty in settings. Editing the first bot reply helps too, since models copy patterns. Good prompt engineering in the card itself prevents most echo loops.

Characters Ending the Story Early

When your roleplay AI keeps wrapping up scenes, the card's prompt is usually guilty. Add a line like "never end the scene" to your persona or author's note. Also trim greeting messages that sound like conclusions. Small wording tweaks change behavior dramatically.

Is Chub AI Safe and Legit?

On privacy, the platform's policy says conversations remain private and API logs skip chat content. Account details like usernames are stored. Still, follow common sense. Don't share real personal details in any character chat, here or anywhere else online.

One funny mix-up worth clearing: "CHUBAI LIMITED" is a UK real-estate company on Companies House. It has zero connection to Chub.ai the platform. Same letters, totally different worlds. If you searched chubai and landed on a property filing, now you know why.

How to Create and Publish Your Own Character Card on Chub AI

Ready to become a character creator? The flow is short:

Name your character and write a description.
Craft the personality and greeting.
Add example dialogue.
Attach lorebooks for world detail.
Pick tags and visibility, then publish.

Want readers? Study demand first. Community threads constantly ask for FemPOV creators, so that niche is hungry. Tag honestly and skip spammy tags, because moderation sweeps (the dreaded "tag nuke") can leave character cards missing from search. Quality tagging keeps your work visible.

Character Card Best Practices

Keep your card lean. Long cards eat the model's memory before chat even starts. Aim for tight personality writing, two or three strong dialogue examples, and a lorebook for extras. Test privately with import character cards tools or SillyTavern before going public.

FAQs About Chub AI

Is There a Chub AI Mobile App?

Sort of. Android users can get an official app, but there's no iOS app right now. iPhone users simply open the site in Safari. The mobile web version works fine. Some fans even run a Telegram AI bot as a workaround.

Can You Use ChubAI With SillyTavern?

Absolutely, and many people do. Since cards follow the TavernAI V2 character cards standard, you can import character cards directly into SillyTavern, TavernAI, or Agnai.chat. Pair them with local AI models for a fully offline AI character chat setup that nobody else sees.

What AI Models Does Chub.ai Support?

Plenty. Native options include Soji, Asha, MythoMax, and Mixtral, depending on your plan. Through an API connection, you can add OpenAI, Claude, NovelAI, and KoboldAI. Test models like GLM 4.5 appear on the free tier sometimes, then rotate out without much warning.

Who Can See My Chats on Chub AI?

Your chats stay private to your account. The platform states that API usage logs only record a user ID and usage numbers, not message content. Private cards stay locked too. For maximum privacy, run exported cards on local LLMs at home.

Why Is Chub AI Down Right Now?

Outages happen, usually during model updates or traffic spikes. When you can't chat on Chub, wait ten minutes and refresh. Check community spaces like Reddit for live reports. If others report the same thing, it's the servers, not you. Patience usually fixes it.

Alternatives Worth Exploring

If Chub AI doesn't quite fit your needs, there are several strong alternatives in the AI roleplay space. Harpy AI Chat offers a friendly community and easy roleplay stories for a wide audience. Pephop AI lets you create and engage with personalized AI characters including SFW and NSFW modes. For those interested in how the broader character AI scene evolved, our Beta Character AI guide breaks down the foundations that many of these platforms are built on.

Final Thoughts

So that's Chub AI in a nutshell: a flexible, open, creator-friendly home for AI roleplay that rewards a little tinkering. It's not as shiny as CAI, but the freedom is unmatched. Bookmark the troubleshooting section above, and you'll sail past the most common headaches.