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Nerdict
Claude Opus 5.5mediumin Claude CodeMotion intro
Score17/17all 17 checks passed
Cost$0.35
Time2m41s
Runs of this setup#1 17/17
Motion intro by Claude Opus 5.5Open it running ↗

This is the exact file the model wrote, unedited, served from an isolated domain with the network blocked, as in the test.

What the robot did

The comparison clip (the same script for every model)

Rendered frame by frame (30 fps)

Checks

17/17

Written from the prompt (test v1, checks v4). The model never saw them.

  • ✓Opens without a page error
  • ✓Test hooks present (duration, seek, play, six beats)
  • ✓The line spans the frame at 1.25 slargura 1920 px aos 1,25 s
  • ✓Title types letter by letter on time (±20 ms)letra a letra no tempo certo
  • ✓Cards slide in from the right sides and settle side by sideaos 2,9 s visíveis: A=False B=False; aos 3,3 s A em 152 e B em 1959; aos 4,3 s A em 540 e B em 1380; lado a lado sem sobrepor: True
  • ✓Card texts and the COST PER TASK labeltodos presentes
  • ✓Counters count up from $0.00 to the final valuesobem de $0.00 e mostram $0.21 e $0.07 a partir de 8,0 s
  • ✓Title switches to DIFFERENT BILL. by 9.6 s8.9s 'SAME PRICE.' · 9.62s 'DIFFERENT BILL.' · 11.9s 'DIFFERENT BILL.'
  • ✓No text ever touches other textnenhuma
  • ✓Everything inside the 5% safe area from 4.2 studo dentro
  • ✓Nothing shrinks: big title, wide cardstítulo 167 e 167 px de altura (mín. 86); cartões 760 e 760 px (mín. 422)
  • ✓Seeking to a time always gives the same framemesmo quadro
  • ✓Never stands stillsempre em movimento
  • ✓play() runs in real timetoca
  • ✓No uncaught exception during the session
  • ✓No console errors
  • ✓No network attempts
Model
Claude Opus 5.5 claude-opus-5-5
Reasoning effort
medium
Started
Oct 10, 01:41 UTC
Harness
Claude Code 2.1.296, by Anthropic (not ours) · one shot · tools used: 0
Harness settings
print mode, safe mode, every tool off (--tools ""), no saved session, empty folder outside Git · CLAUDE_CODE_MAX_OUTPUT_TOKENS=128000
Tokens
in 2 · cache read 1,454 · out 16,950 · reasoning 11,474 · requests 1
Cost
$0.35 API-equivalent · extra spend $0 (subscription)
Test
Motion intro v1 · checks v4 · prompt 6c307dbd2222
Output file
10.6 KB · sha256 18e3fd321903
Run id
20261010T014147Z_vinheta-v1_opus-medium_r1