TikZ: a three-set coffee Venn diagram, by gemini-3.8-flash
gemini-3.8-flash · round 3 of 3 · seed 1$0.20SVGPNGPDFvenn.tex
venn.tex · 65 lines
\documentclass[border=12pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes,backgrounds,positioning}

\begin{document}
\sffamily
\begin{tikzpicture}[thick]
  % Define harmonious colors for the three sets
  \definecolor{cEspresso}{RGB}{205, 92, 92}   % Indian Red
  \definecolor{cMilk}{RGB}{70, 130, 180}       % Steel Blue
  \definecolor{cCold}{RGB}{60, 179, 113}       % Sea Green

  % Bounding box representing universal set of drinks
  \draw[rounded corners=14pt, fill=gray!4, draw=gray!35, line width=1pt] (-5.8, -5.6) rectangle (5.8, 4.8);

  % Circle coordinates: r0 = 1.65, R = 2.85
  % C1 (Espresso): 150 deg -> (-1.429, 0.825)
  % C2 (Milk):      30 deg -> ( 1.429, 0.825)
  % C3 (Cold):     270 deg -> ( 0.000, -1.650)

  % Circle fills with transparency
  \begin{scope}[fill opacity=0.22]
    \fill[cEspresso] (-1.429, 0.825) circle (2.85);
    \fill[cMilk]      (1.429, 0.825) circle (2.85);
    \fill[cCold]      (0.000, -1.650) circle (2.85);
  \end{scope}

  % Circle outlines
  \draw[cEspresso!85!black, line width=1.6pt] (-1.429, 0.825) circle (2.85);
  \draw[cMilk!85!black,     line width=1.6pt] ( 1.429, 0.825) circle (2.85);
  \draw[cCold!85!black,     line width=1.6pt] ( 0.000, -1.650) circle (2.85);

  % Circle Headings / Labels
  \node[cEspresso!90!black, font=\bfseries\large] at (-2.6, 4.1) {Has espresso};
  \node[cMilk!90!black,     font=\bfseries\large] at ( 2.6, 4.1) {Has milk};
  \node[cCold!90!black,     font=\bfseries\large] at ( 0.0, -4.9) {Served cold};

  % Drinks placement: exactly one per Venn diagram region
  % 1. Has espresso only
  \node[align=center, font=\bfseries] at (-2.65, 1.38) {short black};

  % 2. Has milk only
  \node[align=center, font=\bfseries] at (2.65, 1.38) {babyccino};

  % 3. Served cold only
  \node[align=center, font=\bfseries] at (0.00, -3.05) {cold brew};

  % 4. Has espresso + Has milk (not cold)
  \node[align=center, font=\bfseries] at (0.00, 2.22) {flat white};

  % 5. Has espresso + Served cold (no milk)
  \node[align=center, font=\bfseries] at (-1.75, -1.00) {iced\\long black};

  % 6. Has milk + Served cold (no espresso)
  \node[align=center, font=\bfseries] at (1.75, -1.00) {milkshake};

  % 7. Has espresso + Has milk + Served cold (center)
  \node[align=center, font=\bfseries] at (0.00, 0.00) {iced latte};

  % 8. Outside all three circles (Universal set)
  \node[align=center, font=\bfseries] at (-4.00, -3.80) {pour-over};

\end{tikzpicture}
\end{document}
round 1 of 3
A three-set coffee Venn diagram, by Gemini 3.8 Flash, the render after round 1
123What the model saw after each round. The picture above is the round that was scored, round 3.

Passed all four in three rounds, without measuring anything.

modelgoogle/gemini-3.8-flashtasktikz-coffee-venn@v1date2026-09-25rounds3 of 8 allowedcost$0.2047thinkingmediumtokens296,976 in, 34,370 out, of which 30,287 reasoningtime3 min 59 s
Compilesdecided by a number, from the filepass
Seven regions, three namesdecided by a number, from the filepass
Every drink in its regiondecided by a number, from the filepass
No label on an edgedecided by a number, from the filepass
read the post
its other runs
the prompt it was given
Using LaTeX and TikZ, draw a Venn diagram of three overlapping circles labelled "Has espresso", "Has milk" and "Served cold". Write each of these drinks in the region where it belongs: short black, flat white, iced latte, iced long black, cold brew, babyccino, milkshake, pour-over.
Frozen at v1. This model got this and nothing else.
ground truth

Short black is espresso only, flat white espresso and milk, iced long black espresso and cold, iced latte all three, babyccino milk only, milkshake milk and cold, cold brew cold only, and pour-over outside every circle. The circles and words are read back out of the compiled PDF, each word has to be centred in its own region, and no letter may touch a circle's outline, with the line's width counted. How it is scored, and this run's files on GitHub.