Ask HN: Why don't Google/Amazon/Meta/Apple even try to compete with OpenAI?

I believe in competition and right now OpenAI has some kind of a monopoly in commercial large language models. The longer GPT-3 and chatGPT remain the only players in town, the harder it'll be for others to compete. Why is it that no other big tech company has released a commercial model comparable to GPT-3 in the past 2-3 years? I know some of them have in-house models, but why not go public?