4 sessions from the same published task, on one clock. Scrub to any moment and compare what existed, or open a pane to read its full trajectory.
Build a Snake game as a polished single-page web app in this directory: index.html, style.css, game.js (vanilla JS, no deps). Canvas grid; snake grows on eating food; dies on wall or self collision; live score and a high score persisted in localStorage; speed ramps up as the score climbs; arrow keys AND wasd; spacebar to pause; a game-over overlay with a restart button; and a sharp dark neon theme. Make it genuinely nice.
Build a Snake game as a polished single-page web app in this directory: index.html, style.css, game.js (vanilla JS, no deps). Canvas grid; snake grows on eating food; dies on wall or self collision; live score and a high score persisted in localStorage; speed ramps up as the score climbs; arrow keys AND wasd; spacebar to pause; a game-over overlay with a restart button; and a sharp dark neon theme. Make it genuinely nice.
Build a Snake game as a polished single-page web app in this directory: index.html, style.css, game.js (vanilla JS, no deps). Canvas grid; snake grows on eating food; dies on wall or self collision; live score and a high score persisted in localStorage; speed ramps up as the score climbs; arrow keys AND wasd; spacebar to pause; a game-over overlay with a restart button; and a sharp dark neon theme. Make it genuinely nice.
Build a Snake game as a polished single-page web app in this directory: index.html, style.css, game.js (vanilla JS, no deps). Canvas grid; snake grows on eating food; dies on wall or self collision; live score and a high score persisted in localStorage; speed ramps up as the score climbs; arrow keys AND wasd; spacebar to pause; a game-over overlay with a restart button; and a sharp dark neon theme. Make it genuinely nice. Work ONLY in this exact directory: …/snake-antigravity
| pi | codex | claude-code | antigravity | |
|---|---|---|---|---|
| steps | 18 | 73 | 55 | 22 |
| tool calls | 7 | 28 | 25 | 8 |
| duration | 2m 23s | 6m 25s | 10m 16s | 45s |
| tokens out | 3k | 17k | 103k | — |
| reasoning | ~202 | — | — | ~2k |
| compactions | 0 | 0 | 0 | 0 |
| subagents | 0 | 0 | 0 | 0 |
| errors | 0 | 0 | 3 | 0 |
| files | 3 | 3 | 3 | 3 |
Token and context figures come from the harness's own per-turn reporting; sessions captured before telemetry landed show a dash. Reasoning marked ~ is estimated from the transcript's thinking text where the harness doesn't report it separately.
Pairwise picks on the outputs above, from the current Arena tally.
Arena picks do not collect a reason or judging criterion, so no qualitative verdict is inferred here. The bars report only the current comparison tally.