Prerequisites
- FuturMix account — Sign up and top up with at least $10.
- API Key — Log in, go to Console → API Keys, and create a key (starts with
sk-). - Chatbox app — Download the desktop version from chatboxai.app. Windows, macOS, and Linux are all supported.
Setup Steps
Open Settings
Launch Chatbox and click the gear icon in the lower-left corner of the sidebar.
Add a Provider
Navigate to Settings → Model Provider and click "+ Add".
Enter Configuration
| Name | FuturMix |
| API Mode | OpenAI API Compatible |
| API Host | https://futurmix.ai/v1 |
| API Path | (leave empty) |
| API Key | sk-your-key-here |
Verify Connection
Click the "Check" button next to the API Key field. A success message confirms your configuration is correct.
Add Models
Click "Fetch" to auto-load the available model list, or click "+ New" and type a model ID manually.
Recommended models by use case:
| Use Case | Model | Input / Output (per 1M tokens) | Discount |
|---|---|---|---|
| Everyday chat | gpt-5.4-nano | $0.14 / $0.88 | 30% off |
| Code & analysis | gpt-5.4 | $1.75 / $10.50 | 30% off |
| Deep reasoning | claude-opus-4-6 | $4.50 / $22.50 | 10% off |
| Fast responses | claude-haiku-4-5-20251001 | $0.90 / $4.50 | 10% off |
| Best value | gemini-2.5-flash | $0.24 / $2.00 | 20% off |
Start Chatting
Return to the main screen, select a FuturMix model from the model picker, and send a message.
FAQ
What should I enter for API Host?
Enter https://futurmix.ai/v1 and leave API Path empty. Chatbox constructs the full endpoint as https://futurmix.ai/v1/chat/completions.
What if Fetch doesn't load models?
Click "+ New" and type the model ID directly (e.g., gpt-5.4, claude-opus-4-6). Chatbox accepts any model ID you enter manually.
Does it support images and vision?
Yes. Check the vision capability flag when adding a model. You can then drag and drop images into the chat. Supported models include GPT-5.4, Claude Sonnet/Opus series, and Gemini series.
Does it support tool use and function calling?
Yes. Check the tool_use capability flag. This enables Chatbox's built-in web search and MCP tool integrations.
Does it work on iOS?
The desktop app (Windows, macOS, Linux) is the most reliable. iOS may encounter CORS issues with custom API endpoints due to a known Chatbox limitation. Android works normally.
How do I check my balance?
Log in at futurmix.ai and go to Console → Dashboard.
Can I use multiple models at once?
Yes. Add as many models as you want under your FuturMix provider. Switch between them in the model picker at any time.
How is this different from OpenRouter?
Both are OpenAI-compatible multi-model gateways. The setup is identical — change the API Host and key to switch. FuturMix offers 10–30% discounts off official model pricing with no platform fee. OpenRouter charges a 5.5% fee on top of model pricing.
Troubleshooting
| Symptom | Cause | Fix |
|---|---|---|
| Check returns "Connection Failed" | $0 balance or invalid key | Top up (≥$10) and regenerate your API key in Console |
| 401 Unauthorized | Wrong or expired API key | Create a new key in Console → API Keys |
| 404 Not Found | API Host format wrong | Use https://futurmix.ai/v1 (include /v1) |
| Empty response | Model ID typo | Use Fetch to load the correct model list |
| Images not working | Vision flag not checked | Edit the model and enable the vision capability |