ChatGPT's code execution environment has received a major upgrade, now supporting Bash commands, multiple programming languages (JavaScript, Ruby, Perl, PHP, Go, Java, Swift, Kotlin, C, C++), and package installation via pip and npm through an internal proxy. A new container.download tool allows downloading files from the web into the sandboxed environment. These features work through environment variables pointing to OpenAI's internal package registry proxy, enabling network-isolated containers to install dependencies. The upgrade appears undocumented in official release notes despite being available to all users including free accounts.
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