<ul data-eligibleForWebStory="false">Nvidia reaches $4 trillion market valuation, showcasing AI infrastructure monopoly confirmation.Meta invests $3.5 billion in EssilorLuxottica, shifting focus to hardware-software integration.OpenAI challenges Google Chrome by launching AI-powered web browser for enhanced user experience.Perplexity tests AI's pricing ceiling with $200 premium tier subscription plan.OpenAI faces delay in open model release, risking developer ecosystem loss.