TikZ: a three-set coffee Venn diagram, by gemini-3.8-flash
gemini-3.8-flash · round 3 of 3 · seed 2$0.26SVGPNGPDFvenn.tex
venn.tex · 87 lines
\documentclass[tikz,border=20pt]{standalone}
\usepackage[scaled=0.92]{helvet}
\renewcommand{\familydefault}{\sfdefault}
\usepackage[T1]{fontenc}
\usepackage{xcolor}

% Refined, distinct color palette for the three sets
\definecolor{colEspresso}{RGB}{185, 65, 30}   % Warm terracotta / espresso
\definecolor{colMilk}{RGB}{35, 130, 95}       % Fresh forest / sage green
\definecolor{colCold}{RGB}{30, 110, 185}      % Crisp ocean blue
\definecolor{darkText}{RGB}{30, 30, 35}
\definecolor{bgBox}{RGB}{249, 250, 251}
\definecolor{boxBorder}{RGB}{215, 220, 228}

\begin{document}
\begin{tikzpicture}[>=latex]

  % Universe / Bounding box (symmetric and balanced margins)
  \draw[rounded corners=18pt, fill=bgBox, draw=boxBorder, line width=1.5pt]
    (-5.8, -6.25) rectangle (5.8, 5.40);

  % Circles setup:
  % Centers at d=1.8, R=3.2
  % E: 150 deg (-1.5588,  0.900)
  % M:  30 deg ( 1.5588,  0.900)
  % C: 270 deg ( 0.0000, -1.800)
  \coordinate (cE) at (150:1.8);
  \coordinate (cM) at (30:1.8);
  \coordinate (cC) at (270:1.8);

  \def\R{3.2}

  % Filled circles with soft opacity for overlapping region distinction
  \begin{scope}[fill opacity=0.12]
    \fill[colEspresso] (cE) circle (\R);
    \fill[colMilk]     (cM) circle (\R);
    \fill[colCold]     (cC) circle (\R);
  \end{scope}

  % Circle outlines
  \draw[colEspresso, line width=2pt, draw opacity=0.9] (cE) circle (\R);
  \draw[colMilk,     line width=2pt, draw opacity=0.9] (cM) circle (\R);
  \draw[colCold,     line width=2pt, draw opacity=0.9] (cC) circle (\R);

  % Circle labels (Category names, centered over/under respective circle crests)
  \node[font=\bfseries\Large, text=colEspresso, anchor=south] at (-1.56, 4.25) {Has espresso};
  \node[font=\bfseries\Large, text=colMilk, anchor=south]     at ( 1.56, 4.25) {Has milk};
  \node[font=\bfseries\Large, text=colCold, anchor=north]     at ( 0.00, -5.15) {Served cold};

  % Helper style for drink nodes
  \tikzset{
    drink/.style={
      font=\bfseries\normalsize,
      text=darkText,
      align=center
    }
  }

  % --- 8 Drinks in their respective regions ---

  % 1. Has espresso ONLY: short black
  \node[drink] at (150:3.35) {short black};

  % 2. Has milk ONLY: babyccino
  \node[drink] at (30:3.35) {babyccino};

  % 3. Served cold ONLY: cold brew
  \node[drink] at (270:3.40) {cold brew};

  % 4. Has espresso + Has milk (not cold): flat white
  \node[drink] at (90:2.40) {flat white};

  % 5. Has espresso + Served cold (no milk): iced long black
  \node[drink] at (210:2.40) {iced long\\[-1pt]black};

  % 6. Has milk + Served cold (no espresso): milkshake
  \node[drink] at (330:2.40) {milkshake};

  % 7. Has espresso + Has milk + Served cold (all three): iced latte
  \node[drink] at (0, 0.0) {iced latte};

  % 8. Outside all three circles: pour-over
  \node[drink] at (-3.9, -4.2) {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, after working out each label's distance from every circle in Python.

modelgoogle/gemini-3.8-flashtasktikz-coffee-venn@v1date2026-09-25rounds3 of 8 allowedcost$0.2632thinkingmediumtokens583,727 in, 36,490 out, of which 28,895 reasoningtime4 min 55 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.