Where the phrase comes from in this channel The phrase working on the system, not in it appears in the video I Tested GPT‑5.6 Sol for a Month, where Dan Shipper describes the workflow shift that advanced models like GPT‑5.6 Sol open up. The idea is a change in your role: instead of doing tasks yourself (working in the system), you manage a system that does them (working on the system). How it plays out Per the video's framing, exploring this style of working means understanding the model's strengths and limits — what it is good at and where it still falls short — and then combining it with other models so the assembled system carries out the work while you direct it. - The phrase names a workflow shift: from performing tasks yourself to managing a system that does them.- In this channel's material it is tied to GPT‑5.6 Sol and the practice of combining models to cover what each one cannot do alone.- Using models this way depends on a clear picture of their strengths and shortfalls — the core focus of the source video.