Anthropic Research Engineer interview questions

Applied to an online opening, received the take-home coding assessment after a couple of weeks and rejection shortly after having complete the assessment. Reached third level (out of four) in the assessment.

After having a very strong match with job requirements I get an automated mail from anthropic. This was for an online coding assessment. There is no specification on what can be expected from this round. I am a really good developer in general who have built highly scalable systems in industry and also can solve medium to hard algo questions bug free in under 20 min. I still tried to practice some questions in the said platform. On that assessment, there was a stage wise coding problem. It expected you to move so fast and not at all pay attention to what was written in the problem statement. You could do it in expected time only if you magically know the problem before this and have solutions memorized. I scored only 50% and it was a bad score. I have heard people scoring full in these tests and they happen to be rigged. Because there is no way you can type those solutions without having had seen those problems again and again. My worst experience with any company. If recruiters are reading this, please do better.