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Nerdict
Claude Haiku 5.5mediumin Claude CodeAquarium
Score15/15all 15 checks passed
Cost$0.032
Time4m21s
Runs of this setup#1 15/15#2 15/15#3 15/15
Aquarium by Claude Haiku 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)

Checks

15/15

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

  • ✓Opens without a page error
  • ✓Test hooks present (fish, food, tank)
  • ✓Canvas fills the window (at least 1280×720)1920×1080
  • ✓Animation is alive (frames keep changing)393 quadros em 3 s; imagem mudou
  • ✓Smooth: median frame time under 25 msintervalo mediano 8.3 ms (~120 fps)
  • ✓At least 6 fish of at least 2 species8 peixes, espécies ['angelfish', 'goldfish', 'neon-tetra']
  • ✓Fish swim (80% move 30 px in 2 s)8 de 8 percorreram 30 px ou mais em 2 s (ids estáveis: True)
  • ✓Fish never leave the waternenhum fora da água
  • ✓Clicking the water drops food where you clickedração a 0 px do clique em (1536,162)
  • ✓Food sinksdesceu 63 px em 1.4 s
  • ✓Fish go to the food and eat it4 de 4 comidas por um peixe que chegou nelas em até 20 s
  • ✓Fish that ate grew4 de 4 peixes que comeram cresceram
  • ✓No uncaught exception during the session
  • ✓No console errors
  • ✓No network attempts
Model
Claude Haiku 5.5 claude-haiku-5-5
Reasoning effort
medium
Started
Oct 9, 23:56 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 3,125 · out 63,392 · reasoning 51,020 · requests 1
Cost
$0.032 API-equivalent · extra spend $0 (subscription)
Test
Aquarium v1 · checks v1 · prompt 1e1988206e10
Output file
23.3 KB · sha256 2f8703253bae
Run id
20261009T235653Z_aquario-v1_haiku-medium_r2