OpenAI built a smarter AI last month and then refused to release it. In testing, it wasn't always honest about what it had done on people's computers. So today they shipped a cheaper one. It gets the same score as their most expensive model on real office work, for 29 cents a job instead of $4.82. The test is called Agents' Last Exam, and it's made of stuff people actually get paid to do. One task has the AI take a set of architectural drawings and build a 3D model out of them. Another has it…