Cult.fit Builds Operational Muscle with Codex
OpenAI, Thursday, November 5th, 2026
Indian fitness company Cult.fit standardized on Codex and the OpenAI API for engineering, internal tools, its AI Trainer and support.
In this OpenAI customer story, Cult.fit, an Indian fitness company with 708 centers and nearly one million paid members, describes standardizing its software development lifecycle on Codex.
It uses Codex agents for site reliability, security and on-call work, and says a social feed estimated at over a year of work shipped in two months.
Non-engineering teams have built more than 20 internal applications, and an engineer rebuilt an internal dashboard tool over a weekend, saving over USD 100,000 a year.
Cult.fit also uses the OpenAI API and GPT Realtime for a voice-first AI Trainer, and AI agents in customer support, reporting a support cost reduction of more than 50%.