Use any model and any provider with the official OpenAI Codex Desktop App, without modifying its code, and continue to use the official models in parallel?

All in the title. The official OpenAI Codex Desktop App only accepts models that are from OpenAI and from a curated list. But there is a trick, you can make it think you are using the official OpenAI servers and models by just impersonating the model name and using another one. There is three things you need to do 1) The first one is to modify the officiel config of the codex desktop app. This is none intrusive and doesn’t break the app in anyways, and can also be reverted. You can do that by going in the settings and clicking the « open config.toml » link.