I have the usual programs running on my Mac, along with open-codex: Emacs, web browser, terminals, VSCode, etc. Even with large contexts, open-codex with Ollama and Gemma 3 27B QAT does not seem to overload my system.

To be clear, I sometimes toggle open-codex to use the Gemini 3.5 Pro API also, but I enjoy running locally for simpler routine work.