How to Use Chub AI in 2026

To start using Chub AI, visit the Chub AI website and sign up for a free account. No credit card is required. Once logged in, you land on the main library page, which displays thousands of user-created character cards. The library is organized by categories such as Anime, Video Games, Original Characters, and more. You can also use the search bar to find specific characters by name, series, or tags. Each character card shows a profile image, a short description, and key attributes like personality tags. Clicking on a card opens its full page, where you can read the character's greeting message, view their example dialogues, and see the prompt structure used to define their behavior. The platform is community-driven, meaning most cards are uploaded by users, so quality and consistency vary. However, popular characters often have multiple versions with different writing styles or scenarios. The search filters allow sorting by newest, most liked, or most chatted, helping you find the best options quickly.

Chub AI itself does not host language models; it requires you to connect an external AI backend to run the character conversations. The most common backends are KoboldAI (local or cloud), OpenAI API (using GPT-3.5 or GPT-4), and NovelAI. To configure, go to your account settings and find the 'API' section. Here you can enter your API key for OpenAI or provide the URL for a KoboldAI instance. For free use, many people run KoboldAI on their own computer using a tool like KoboldCPP or Oobabooga's Text Generation WebUI. This requires a decent GPU but gives you full control. Alternatively, you can use cloud-hosted KoboldAI services like Mancer or Horde, which offer free tiers but may have queue times. When selecting a backend, consider the trade-off between speed, cost, and model quality. GPT-4 offers excellent roleplay but costs money per token. Local models like Mythomax or Tiefighter are free and can produce good results on modern hardware. Chub AI supports switching backends per chat, so you can test different setups.

Once you have selected a character and configured a backend, click the 'Chat' button on the character's page. A new chat window opens with the character's greeting message already displayed. You can then type your first message. The character will respond based on its card's prompt, example dialogues, and your backend model. To get the best experience, read the character's description carefully – it often includes important context like their personality, scenario, or rules for the roleplay. You can also edit your own message before sending, or use the 'regenerate' button to get a different response from the AI. Chub AI's interface includes options to view the character's full definition (including system prompt) and to adjust generation parameters like temperature and max tokens. Higher temperature (e.g., 1.2) makes responses more creative; lower (e.g., 0.7) makes them more focused. You can also create multiple chat branches with the same character to explore different storylines without losing previous conversations.

Chub AI allows you to edit any character card for your own use, or create entirely new ones from scratch. To edit a card, open it and click the 'Edit' button. You can change the name, description, avatar, greeting message, and the detailed prompt that defines the character's behavior. The prompt is written in a format called 'W++' or 'Plain Text', which the backend model interprets. You can also add example dialogues to show the model how the character should speak. Creating a new card requires filling in these same fields. The platform provides a template to guide you. Once saved, your card becomes private by default, but you can choose to publish it to the public library. Editing existing cards is useful for fixing typos, updating scenarios, or adjusting personality traits to better suit your preferences. Chub AI also supports importing and exporting cards in JSON or PNG format (using the 'card' format), making it easy to share characters with other platforms like SillyTavern.

Users often encounter errors when the backend connection fails or the model is overloaded. If you see 'API Error' or 'No response', first check that your API key is valid (for OpenAI) or that your local KoboldAI instance is running on the correct port. For local setups, ensure your model is loaded and that your computer meets the minimum VRAM requirements – 6GB for 7B models, 12GB for 13B models. If responses are very slow, you may have a weak GPU or a cloud backend with high latency. Try using a smaller model (e.g., 7B instead of 13B) or reducing the max tokens to 150-200. Another common issue is the character speaking out of character; this often happens when the system prompt is too short or the temperature is too high. Increase the prompt length or lower temperature. If chats suddenly stop saving, clear your browser cache or try a different browser. The Chub AI community Discord is active and can help with specific problems. For persistent backend issues, consider switching to a different backend entirely.

While Chub AI offers flexibility through its open-source card system and multiple backend options, it requires technical setup and ongoing management. For users who prefer a plug-and-play experience without configuring APIs or running local models, platforms like AIAngels provide a simpler alternative. AIAngels includes a real free tier with unlimited text chat across 70+ curated companions, and its premium plan ($2.99/month on annual) includes image generation and voice messages with no credit gating. Memory persists permanently without degradation, unlike Chub AI where conversation history is limited by the backend's context window. However, Chub AI's strength is its vast library of user-created characters and the ability to run completely free with local models, making it ideal for users who want total control and are comfortable with technical setup. The choice depends on whether you prioritize ease of use and all-in-one features over customizability and cost flexibility.