TextGPT

TextGPT lets you text questions to OpenAI's models from any phone and get answers back by SMS, including generated images. It suits people who prefer texting or have a basic phone, and it is paid for with prepaid credit packs.

Each exchange costs credits for the text messages themselves, billed per SMS segment like a carrier, plus the model's tokens at the rate of the tier you choose. Luna is the default and costs about a tenth of Terra, more thinking costs more, and a web search adds a flat charge.

Images come in draft, standard and sharp quality levels with different credit costs, and you can text a photo to ask about it. Your account page shows the balance and lets you switch models. Conversation memory and cloud backup are listed as coming soon.