Foundation Model Lab

OpenAI

OpenAI sells ChatGPT subscriptions and GPT-5 model APIs, with an S-1 on file and an IPO pushed rather than priced low.

OpenAI sells ChatGPT across consumer, Team, and Enterprise tiers plus API access to the GPT-5 model line, with the GPT-5.6 family (Sol, Terra, Luna) as the current default lineup. The ChatGPT app passed 1 billion monthly active users, and revenue runs near $25 billion annualized. The structural fact: a $122 billion round — anchored by Amazon, Nvidia, and SoftBank — closed at an $852 billion valuation, a confidential S-1 is filed, and the listing has reportedly been delayed rather than accept a below-target price.