Sats for chat.
Pay with Lightning. Use GPT-4.1 mini or GPT-5.4 mini through our Routstr node. No subscription or OpenAI account needed.
1 · Add a small balance
Start with 32–100 sats. This is an early pilot with a small supplier budget, not a guaranteed service. Keep your key and invoice safe; do not deposit large amounts.
Pay the invoice in your Lightning wallet. Keep this page open; your key appears after payment. No wallet yet? Phoenix is one option; installation and wallet/channel fees are separate.
2 · Keep your key
Your key controls your balance. It is kept only in this tab's session storage. Save it privately before closing the tab. There are no tracking scripts.
No funded key connected.
3 · Chat
Text chat only. Maximum 1,024 output tokens per request, 32,768 input characters. No images, audio, built-in search, tools, Responses API or priority tier in this pilot.
Pricing & API
Model token prices are supplier standard rates × 1.05. Routstr payment fees and millisat rounding may affect the final charge; the API response is authoritative.
- GPT-4.1 mini: $0.42 input / $1.68 output per million tokens; cached input $0.105.
- GPT-5.4 mini: $0.7875 input / $4.725 output per million tokens; cached input $0.07875.
OpenAI-compatible text-chat API base:
https://routstr.sms4sats.com/v1Live models and pricing · Node information · About Routstr
Unused balance
You can request a Cashu ecash refund. This clears the key balance; a fractional sat may not be redeemable. Save the returned token privately and redeem it with a compatible Cashu wallet. This is not an automatic Lightning refund.
Privacy & acceptable use
Requests are forwarded to OpenAI and subject to OpenAI usage policies. Lightning payments are not a guarantee of anonymity. Do not submit secrets or sensitive personal data. The operator and underlying supplier can process request data; operational request, usage and payment metadata may be recorded. Abuse is prohibited and access may be suspended. For help, use your existing contact with SMS4Sats. Keep deposits small until availability and recovery are proven.