26th January 2026
Research
What we learned today about this ChatGPT “container” environment
— Experiments in the ChatGPT sandbox reveal that general outbound internet access from Python and other user code (such as HTTP requests) is entirely blocked, while package managers like pip and npm are permitted to fetch dependencies using curated internal registry proxies. The container provides a privileged fetching mechanism (`container.download`) for select public URLs, which is more powerful than standard code-based networking.
Recent articles
- Claude's new system prompt really doesn't want to reproduce song lyrics - 2nd September 2026
- Claude Fable 5.1 made me a really nice animated pelican - 1st September 2026
- Understanding ChatGPT Work - 30th August 2026