Well there's a good reason that OpenAI partnered up with Microsoft. The calculation is that the established big techs - Amazon, Apple, Microsoft, Google, Meta are all going to be significantly impacted by AI so it's not unreasonable to look at Anthropic at 10% of their market cap as a reasonable value. Would it be worth Apple to bring Anthropic in house? They failed to deliver AI themselves, they know the risks of being dependent on Google. If AI goes far enough it may totally remove Apple's differentiation.
Some of the Big Techs are building their own in house stuff (Meta, Google), but it wouldn't be crazy to see acquisitions by the others, especially if the market cools slightly. And then there's the possibility that these companies mature their revenue streams enough to start actually really throwing off money and paying off the investment.