Chub AI
Chub AI uses FreeTheAI as an OpenAI reverse proxy. You enter the base URL and key in Secrets, check the proxy, then choose the model in Configuration.
Category: Roleplay apps. Before you start, you need a FreeTheAI account, an API key, and today's check-in.
Settings
| Setting | Value |
|---|---|
| Secrets > OpenAI | Reverse Proxy |
| OpenAI Reverse Proxy | https://api.freetheai.org/v1 |
| Reverse Proxy Key | Your FreeTheAI key (ftai_..., 53 characters) |
| Configuration > Prompt Structure > API | OpenAI |
| Model | fta/zai/glm-5.3 |
Steps
Open Secrets
In any chat, open the menu (three lines, top right) and choose Secrets, then OpenAI.
Turn on the reverse proxy
Choose Reverse Proxy instead of your own OpenAI key. Enter the base URL ending in /v1 (not /chat/completions) and your FreeTheAI key.
Check the proxy
Press Check Proxy and wait for the green confirmation. Chub loads the model list from FreeTheAI at this step.
Pick the model
Open the menu again, choose Configuration, then Prompt Structure. Set API to OpenAI and pick a model that starts with fta/. Save.
Tips
- Refresh the page if the model list stays empty after a successful check.
- Chub's list may show models FreeTheAI does not serve. Only fta/ models work.
Common questions
Check Proxy fails on Chub. Why?
The URL must be the base URL api.freetheai.org/v1. A full /chat/completions URL fails, because Chub adds the path itself.
Can I use FreeTheAI on the Chub mobile site?
Yes. The same Secrets and Configuration menus are in the mobile chat view.
Check Proxy works but no FreeTheAI models appear. What now?
Refresh the page, then look again under Configuration, Prompt Structure. Only models that start with fta/ work.
Why do I get a 401 error?
The key is wrong or incomplete. Paste the whole ftai_ key (53 characters), with no spaces.
Why do I get a 403 error?
Free models need one check-in a day. Check in at freetheai.org/checkin, then try again.
It loads for a long time, then shows an error or an empty reply. Why?
The model is busy. Try another model, and check freetheai.org/status.
A model rejects my settings. How do I fix it?
Reset temperature and the other sampling settings to their defaults, then try again.
Which models are good for roleplay on Chub?
fta/zai/ and fta/kimi/ models, for example fta/zai/glm-5.3. fta/dog/ and fta/lion/ models are for general chat and refuse roleplay.
More help
How this guide was checked
Checked against Chub's API connection docs and current reverse proxy guides on 2026-09-29.