I find the framing of this story quite frustrating.
The purpose of new benchmarks is to gather tasks that today's LLMs can't solve comprehensively.
It an AI lab built a benchmark that their models scored 100% on they would have been wasting everyone's time!
Writing a story that effectively says "ha ha ha, look at OpenAI's models failing to beat the new benchemark they created!" is a complete misunderstanding of the research.