GPX: a run that spells COFFEE, by deepseek-v4.1-flash — deepseek-v4.1-flash · round 1 · seed 1$0.11SVG run.gpx

gallery/A run that spells COFFEE/DeepSeek 4.1 Flash, run 1

10.4 km on real streets, worst point 17.8 m out, and COFFEE with the route along the tops of the letters. One round, because the clock ended it there.

modeldeepseek/deepseek-v4.1-flashtaskgpx-coffee-run@v2date2026-09-20rounds1 of 8 allowedcost$0.1085thinkingmediumtokens1,669,162 in, 58,340 out, of which 45,018 reasoningtime12 min 0 s

What the harness did to this run. The 12-minute clock ended it before the model finished, so this is where it had got to when time ran out.

On real streetsdecided by a number, from the filepass

One continuous routedecided by a number, from the filepass

Inside the griddecided by a number, from the filepass

Metadata truedecided by looking · Pass if every street the file's description names is one the trace runs along for at least a block, read off the map under the trace. One named street the route never uses fails it.pass

Reads as COFFEEdecided by looking · Pass if the six letters can be read off the plotted trace in order, by someone not told the word first. In practice that someone is me, and I knew the word, which is the weakness of this check.pass

There is no post about this one, since only some results need one, so the picture, the source and the scoring are here instead.

same prompt

same prompt, other modelsall 6 runs on A run that spells COFFEE →

the prompt it was given

Write a GPX file for a running route through Melbourne's CBD whose GPS trace spells COFFEE. It has to be a route someone could actually run: along the streets, not through the buildings.

Frozen at v2. This model got this and nothing else.

ground truth

An OpenStreetMap extract of the Hoddle Grid (streets and water, ODbL, taken 2026-09-16), the same one the harness ships for rendering. Every track point is measured to the nearest street centreline. How it is scored, and this run's files on GitHub.