Chub AI
Chub AI is an AI character chat and roleplay platform. See 2026 pricing for Free, Mercury ($5/mo), and Mars ($20/mo) tiers, plus key features and limits.
About Chub AI
Chub AI is an AI character chat and interactive storytelling platform where users create or select custom AI personas, each with its own personality, backstory, and rules, for roleplay and long-form fiction.
What is Chub AI (2026 update)
Chub AI lets users build custom characters from scratch, naming them, setting an avatar, and defining personality and backstory, then chat with them using a range of underlying language models. It is built specifically for roleplay and creative writing use cases, with tools for managing long-term memory, conversation style, and world consistency across extended chats, rather than being a general-purpose assistant.
What is new in 2026
Chub AI’s model lineup has expanded through 2026 to include access to a large 671-billion-parameter model called Soji, alongside models like Asha 70B and Mixtral 8x7B, offered on its top Mars tier. Multimedia generation (images, and in some tiers voice) has also become a core part of the paid plans rather than a side feature. On the billing side, several user reports from around August 2026 note that Chub has been charging its Mercury and Mars tiers in four-month blocks rather than true month-to-month, meaning the entry tier can cost close to $20 upfront and the mid tier around $80 upfront, so check the official site for current billing terms before subscribing.
Key features
- Custom character creation with name, avatar, personality, and backstory
- Lorebook system for persistent world-building memory across long roleplay sessions
- Group chats supporting multiple users or multiple AI characters at once
- Stages, a developer feature for adding custom UI, mini-games, or special interactions to a roleplay
- Access to a range of models from smaller finetunes up to the 671B Soji model on higher tiers
- Multimedia and voice generation on paid tiers
Pricing in 2026
Chub AI uses a three-tier structure: a free plan with basic models and character tools, and two paid tiers that unlock larger models and multimedia features.
| Plan | Price | What you get |
|---|---|---|
| Free | Free | Basic AI models, chat with existing characters, create your own characters, save/export chats, basic image generation |
| Mercury | $5/month (reportedly billed in 4-month blocks) | Mistral 7B finetune, MythoMax 13B, 8K tokens of memory, multimedia generation, access to future models up to 13B |
| Mars | $20/month (reportedly billed in 4-month blocks) | Soji 671B, Asha 70B, Mixtral 8x7B, unlimited voice, unlimited multimedia generation, early access to new models |
Given the reports of upfront multi-month billing, check the official site’s checkout flow for the exact charge before subscribing.
Who should use it
Chub AI fits users who want deep, ongoing roleplay or interactive fiction with characters they design themselves, and who value control over memory, personality, and world details across long conversations. The Mercury tier is positioned by reviewers as the best value for most casual users, while Mars suits people who specifically want access to the largest available models and unlimited multimedia output.
Limitations and alternatives
The reported four-month billing blocks mean the advertised monthly price is not always what gets charged upfront, so budget-conscious users should verify billing terms before signing up. The free tier is limited to basic models and basic image generation, so anyone wanting larger models or voice output needs a paid plan. Alternatives in the AI character chat space include Character.AI, which has a larger mainstream user base and stricter content moderation, JanitorAI, which similarly focuses on less-restricted roleplay characters, and Replika, which is oriented more toward a single ongoing companion relationship than open-ended multi-character roleplay.
Frequently asked questions
How much does Chub AI cost?
Chub AI has a free plan, a Mercury plan at $5/month, and a Mars plan at $20/month, though some users report these paid tiers are billed in four-month blocks upfront.
What models does Chub AI offer?
The free plan uses basic models, Mercury adds Mistral 7B and MythoMax 13B, and Mars adds larger models including a 671-billion-parameter model called Soji, Asha 70B, and Mixtral 8x7B.
What is the Lorebook feature?
Lorebook is Chub AI's persistent world-building memory system that helps keep long-form roleplay consistent over extended conversations.
Can I create my own AI characters on Chub AI?
Yes, on any plan including free, you can create custom characters with your own name, avatar, personality, and backstory.
Information last verified: September 2026.
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