Elon Musk is a famous person who makes cool things like cars and rockets. He said he wants to make a robot that looks like a human, but some other rich people with big companies also want to make one. They all have lots of money and smart people working for them. Read from source...

1. The title is misleading and sensationalized, as it implies a direct competition between Tesla's Optimus and the other humanoid robot ventures mentioned in the article. However, there is no clear indication of how or when such a competition would take place, or what criteria would be used to measure its outcome. The title also suggests that Elon Musk is challenging OpenAI, Microsoft, and Bezos, which may not be accurate, as he may just be expressing his own interest in the field of humanoid robots without directly targeting them as opponents.