ChatGPT developer is considering filing for an IPO by the second half of 2026, according to reports ChatGPT developer is considering filing for an IPO by the second half of 2026, according to reports OpenAI is reportedly gearing up for a stock market listing valuing the company at $1tn (£76bn) as soon as next year, in what would be one of the biggest ever initial public offerings. The developer behind the hit AI chatbot ChatGPT is considering whether to file for an IPO as soon as the second