Bloch said in his post that Hiro employees are coming with him to OpenAI. He didn’t specify how many employees that includes, but LinkedIn lists about 10 people associated with the company. Bloch declined to offer further comment.

The company was founded in 2024 and launched its AI tool about five months ago. Hiro offered AI-powered financial planning for consumers. Users entered financial information like salary, debts, and monthly costs and the app modeled different what-if scenarios to help them make financial decisions.

Hiro was specifically trained to nail financial math, including an option that allowed users to verify accuracy, Bloch said in a demo of the product. Over the past couple of years, state-of-the-art frontier models have gotten significantly better (even good) at math of all kinds. But historically, they haven’t been.

This deal stands out for a couple of reasons. Bloch previously founded neobank Digit, which helped people automatically save money. Digit was sold to Oportun in 2021 for, it said, more than $200 million.