OpenAI's sandbox misconfigurations were egregious. The other frontier labs (Meta and Google) have many more security engineers and researchers on staff, and that's likely why you haven't read as many damning headlines about them. OpenAI and Anthropic talk a lot about cybersecurity safety, but instead of using it as an opportunity to increase their security engineering/researcher headcount they are just reassigning SWEs and PEs to do security engineering work.
It's pretty obvious now to everyone that OAI and Ant do not take cybersecurity seriously. It will not be a priority unless they are held accountable. This is sadly how it always goes, but usually it's the company getting breached/ransomed/fined that triggers them to actually start taking security seriously, not company insiders committing felonies with the tools they built :)