CodexWorkA chat can suggest where to run. A more useful result might be a loop you can see, inspect and move into another tool. That change is easy to miss if you still ask an Agent only for advice.
In his 12 September account, Simon Willison reports using ChatGPT Work with GPT-6 Astra Max to make running routes, a map and downloadable route data. It is an experienced user’s account, not a test of what every subscriber can produce on a first attempt.
The linked HTML artifact is worth opening. So is the published map image: a blue loop is easy to distinguish from the quieter streets and coast beneath it. The output has a shape you can judge, rather than a paragraph asking you to imagine the route.
The object contains more than its picture
We inspected the HTML’s embedded data on 24 October. Its approximately 5K loop has 213 valid coordinate pairs and returns to its starting point. A separate spherical-distance calculation gives about 5.099 km, consistent with the rounded 5.1 km label. The artifact also contains the surrounding map features and labels.
That is a modest but useful finding: there is actual route geometry inside the file. Another program can inspect it without recovering the original conversation. It is not merely a screenshot of a route.
We did not test the reported separate GPX or GeoJSON downloads, import the route into a mapping app, or exercise the live map’s pan and zoom. Inspectable data and a successful import are different claims. So are an agreeing distance and a safe place to run.
A finished result can still have a missing history
Willison also reports that he could not later recover the code used to create the result. The article’s explanation for that loss is not independently established here. The practical distinction survives: having a finished object does not necessarily mean having the process that made it.
For something you may revise, ask for both the usable result and its editable source while the work is still in progress. A presentation can be editable but have no trustworthy sources. A map can contain portable data but lack its generation script. “Downloadable” is not a single quality that settles every future need.
Try the kind of delegation, not this person’s journey
The transferable move is to ask for an object: a map with route data, a schedule you can import, a diagram you can edit, or a report whose sources you can follow. Say what you will do with it next. Then open it in that next setting and request one meaningful change.
This route is selected as an inspectable external example, not a real-world running recommendation. No road-access, crossing, trail-condition or safety assessment was performed. The author retains their material; the links above let you inspect the original rather than a repackaged copy. We have not reproduced the generation or measured ordinary-user success.