They wouldn't be the only party, but they are in my opinion the most likely party.

What the people that can monetize it? Microsoft, X, IBM, Salesforce, Discord, Google

Microsoft would likely buy OpenAI due to their investment and integration with OpenAI. Making Anthropic not that valuable.

Google would likely buy Anthropic due to their investment and ties to Anthropic.

X, Salesforce maybe. Not sure Discord has the money. No idea if IBM capable of growing.

All this changes if Anthropic figures out a moat/sticky product that doesn't just depend on having the best LLM. If they pull off https://claude.com/solutions/healthcare then all bets are off.