OpenAI is preparing to file for an initial public offering as soon as within days or weeks, with CEO Sam Altman targeting a market debut by September, according to reports citing sources familiar with the matter. The company is working with Goldman Sachs and Morgan Stanley and may file confidentially with regulators imminently — a move that follows a day after Elon Musk lost his lawsuit against Altman and OpenAI, removing a significant legal and structural threat to the company. The listing is expected to be one of the largest in recent memory, potentially competing with a SpaceX IPO also anticipated imminently.
Alongside the IPO news, OpenAI announced that one of its general-purpose reasoning models has produced an original mathematical proof disproving a geometry conjecture posed by Paul Erdős in 1946 — a problem unsolved for nearly eighty years. Unlike a previous embarrassing claim by former executive Kevin Weil that GPT-5 had solved ten Erdős problems — later found to be solutions already existing in academic literature — this result came with supporting remarks from respected mathematicians including Noga Alon, Melanie Wood, and Thomas Bloom.
OpenAI said the achievement demonstrated that AI systems could now sustain complex chains of reasoning across disciplines, with implications extending into biology, physics, and medicine.
