What you need
- Your CheapAI API key from the order email or portal
- The OpenAI-compatible base URL:
https://cheapai-netifly-app.up.railway.app/v1 - One exact model slug from Supported Models
Desktop setup
In ChatBox desktop, add or edit the custom provider entry that is meant for OpenAI-compatible models. The exact labels differ by version, but the important fields are usually Provider, API Key, Base URL, and Model.
| Field | Value | Notes |
|---|---|---|
| Provider type | OpenAI-compatible or custom OpenAI provider | Use the option that allows a custom base URL. |
| Base URL | https://cheapai-netifly-app.up.railway.app/v1 |
Do not add a second /chat/completions path manually. |
| API key | Your delivered CheapAI key | Paste it exactly and avoid extra spaces. |
| Model | claude-sonnet-4-6-20260217 |
You can switch later after the first test works. |
Mobile setup
ChatBox mobile generally follows the same values as desktop. If the mobile build supports imported providers or manual provider editing, use the same key, base URL, and model slug.
Desktop and mobile should match.
If one platform works and the other does not, compare the provider type and base URL character for character before changing anything else.
First test
Start with a short prompt and a known-good model slug. Do not debug multiple variables at once.
- First prompt: a short greeting or single-sentence question
- First model:
claude-sonnet-4-6-20260217orgpt-5.4-codex - After that works, switch to the rest of your preferred models
Common mistakes
- Using the wrong provider type so ChatBox ignores your custom base URL
- Using the root host instead of the
/v1base URL in an OpenAI-style setup screen - Typing the model slug by memory instead of copying it exactly
- Assuming a failed email means the order failed, instead of checking the portal or claim path