White House opposes Anthropic's plan to let 70 more firms access Mythos, raising total to 120 entities, citing security concerns.
Officials worry the model can discover software vulnerabilities and launch cyber attacks, and Anthropic may lack computing power for expanded use.
Anthropic is seeking investment at a $900 billion valuation, potentially more than doubling its current value to fund computing capacity.
Market reaction shows GOOGL up 0.05%, AMZN up 1.29%, NVDA down 1.84% following the news.