FAQ
1. Which API endpoint should I use?
- Standard API:
https://api.letai.run/v1 - CN2 accelerated API:
https://cn-api.letai.run/v1 - Website:
https://api.letai.run/
Use the standard endpoint by default. Choose the CN2 endpoint only when it better fits your actual network environment.
2. What is different from the official OpenAI endpoint?
In most clients, you only need to replace Base URL and API key:
- Official:
https://api.openai.com/v1 - Let AI Run:
https://api.letai.run/v1
The request shape (for example /chat/completions) stays compatible.
3. How can I verify my setup?
Send a minimal curl request. If the response includes choices and model output, your setup is usually correct.
See: .
4. How does billing work?
- Balance uses pay-as-you-go billing.
- Current conversion is
1R = 1 USD. - Pricing may change with upstream cost fluctuations.
See details: .
5. Are invoices available now?
Not yet. Invoice support is expected after June 2026, subject to platform announcements.
6. What is the service scope and redeem code scope?
- The service is not offered to users in Mainland China. It is intended only for global users outside Mainland China and for projects or products serving markets outside Mainland China.
- If your product or service targets markets outside Mainland China, collaboration is welcome.
- We also provide customized support for OPCs (one-person companies), with flexible support based on business scenario, target market, and product stage.
- Redeem codes are only valid within the scope above. Any liability or consequence arising from misuse, out-of-scope usage, or violation of applicable laws remains solely the user's responsibility.
- Once a redeem code is redeemed or used, you are deemed to have acknowledged and agreed to the relevant site agreements and notes.
See details: and .