CLAUDE-SONNET-5 · 20260723-v2-library

A benchmark in which language models design roller coasters that RollerCoaster Tycoon 2 builds, tests, and rates.

claude-sonnet-5 · 3rd of 3 compare all models →

library · wooden · driver-api · library mode — models may search the stock track design library, which measures retrieval and adaptation; copies score zero

excitementintensity×build failed
0515intensity ceiling 10round 1: excitement 5.62round 2: excitement 5.91round 3: excitement 6.06round 4: excitement 6.00round 5: excitement 6.22round 6: excitement 6.306.30round 1: intensity 6.14round 2: intensity 6.88round 3: intensity 7.07round 4: intensity 7.23round 5: intensity 7.88round 6: intensity 8.29R1R2R3R4R5R6
score
6.30
intensity
8.29
nausea
4.62
best round
6
rated rounds
6/6
similarity
0.35
tokens / cost
—
Studied 2 library design(s)
track design preview: Judge Roy Scream
Judge Roy Scream
track design preview: Titan
Titan
6 round(s)

Round 1

excitement 5.62 intensity 6.14 nausea 3.66 length 489 drops 3 airtime 28 tested ok similarity 0.28 (nearest: Flight of the Phoenix)

library: 1 search(es) studied Judge Roy Scream, Titan

track program (64 pieces)
{
  "pieces": [
    "begin_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "end_station",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    {
      "chain": true,
      "t": "flat_to_up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_right_bank"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_bank_to_flat"
    },
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat",
    "flat_to_down_25",
    "down_25_to_down_60",
    "down_60",
    "down_60_to_down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_right_bank",
    "right_helix_down_large",
    "right_helix_down_large",
    "right_bank_to_flat",
    "s_bend_left",
    "s_bend_right",
    "brakes",
    "brakes",
    "brakes",
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat"
  ],
  "ride_type": 52,
  "start": {
    "dir": 2,
    "x": 30,
    "y": 30
  }
}
park screenshot, claude-sonnet-5 round 1 view 1

Round 2

excitement 5.91 intensity 6.88 nausea 3.99 length 557 drops 4 airtime 41 tested ok similarity 0.29 (nearest: Bat Flight)

library: 1 search(es)

track program (78 pieces)
{
  "pieces": [
    "begin_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "end_station",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    {
      "chain": true,
      "t": "flat_to_up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_right_bank"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_bank_to_flat"
    },
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat",
    "flat_to_down_25",
    "down_25_to_down_60",
    "down_60",
    "down_60",
    "down_60_to_down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_right_bank",
    "right_helix_down_large",
    "right_helix_down_large",
    "right_bank_to_flat",
    "s_bend_left",
    "s_bend_right",
    "brakes",
    "brakes",
    "brakes",
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat"
  ],
  "ride_type": 52,
  "start": {
    "dir": 2,
    "x": 30,
    "y": 30
  }
}
park screenshot, claude-sonnet-5 round 2 view 1

Round 3

excitement 6.06 intensity 7.07 nausea 4.50 length 660 drops 4 airtime 41 tested ok similarity 0.31 (nearest: Red Baron)

library: 1 search(es)

track program (86 pieces)
{
  "pieces": [
    "begin_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "end_station",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    {
      "chain": true,
      "t": "flat_to_up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_right_bank"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_bank_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_left_bank"
    },
    {
      "chain": true,
      "t": "left_helix_up_small"
    },
    {
      "chain": true,
      "t": "left_helix_up_small"
    },
    {
      "chain": true,
      "t": "left_bank_to_flat"
    },
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat",
    "flat_to_down_25",
    "down_25_to_down_60",
    "down_60",
    "down_60",
    "down_60_to_down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_right_bank",
    "right_helix_down_large",
    "right_helix_down_large",
    "right_bank_to_flat",
    "flat_to_left_bank",
    "left_helix_down_small",
    "left_helix_down_small",
    "left_bank_to_flat",
    "s_bend_left",
    "s_bend_right",
    "brakes",
    "brakes",
    "brakes",
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat"
  ],
  "ride_type": 52,
  "start": {
    "dir": 2,
    "x": 30,
    "y": 30
  }
}
park screenshot, claude-sonnet-5 round 3 view 1

Round 4

excitement 6.00 intensity 7.23 nausea 4.18 length 566 drops 4 airtime 36 tested ok similarity 0.30 (nearest: Danglefeet)

library: 1 search(es)

track program (80 pieces)
{
  "pieces": [
    "begin_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "end_station",
    {
      "chain": true,
      "t": "flat_to_up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_right_bank"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_bank_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_left_bank"
    },
    {
      "chain": true,
      "t": "left_helix_up_small"
    },
    {
      "chain": true,
      "t": "left_helix_up_small"
    },
    {
      "chain": true,
      "t": "left_bank_to_flat"
    },
    "flat_to_left_bank",
    "banked_left_turn_3",
    "left_bank_to_flat",
    "flat_to_right_bank",
    "banked_right_turn_3",
    "right_bank_to_flat",
    "flat_to_right_bank",
    "banked_right_turn_3",
    "right_bank_to_flat",
    "flat_to_left_bank",
    "banked_left_turn_3",
    "left_bank_to_flat",
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat",
    "flat_to_down_25",
    "down_25_to_down_60",
    "down_60",
    "down_60",
    "down_60",
    "down_60_to_down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "s_bend_left",
    "s_bend_right",
    "brakes",
    "brakes",
    "brakes",
    "flat",
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat"
  ],
  "ride_type": 52,
  "start": {
    "dir": 2,
    "x": 30,
    "y": 30
  }
}
park screenshot, claude-sonnet-5 round 4 view 1

Round 5

excitement 6.22 intensity 7.88 nausea 4.45 length 592 drops 5 airtime 42 tested ok similarity 0.33 (nearest: Judge Roy Scream)

library: 1 search(es)

track program (90 pieces)
{
  "pieces": [
    "begin_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "end_station",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    {
      "chain": true,
      "t": "flat_to_up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_right_bank"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_bank_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_left_bank"
    },
    {
      "chain": true,
      "t": "left_helix_up_small"
    },
    {
      "chain": true,
      "t": "left_helix_up_small"
    },
    {
      "chain": true,
      "t": "left_bank_to_flat"
    },
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat",
    "flat_to_down_25",
    "down_25_to_down_60",
    "down_60",
    "down_60",
    "down_60",
    "down_60",
    "down_60_to_down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "s_bend_left",
    "s_bend_right",
    "brakes",
    "brakes",
    "brakes",
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat"
  ],
  "ride_type": 52,
  "start": {
    "dir": 2,
    "x": 30,
    "y": 30
  }
}
park screenshot, claude-sonnet-5 round 5 view 1

Round 6

excitement 6.30 intensity 8.29 nausea 4.62 length 607 drops 5 airtime 40 tested ok similarity 0.35 (nearest: Judge Roy Scream)

library: 1 search(es)

track program (92 pieces)
{
  "pieces": [
    "begin_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "middle_station",
    "end_station",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    "flat",
    {
      "chain": true,
      "t": "flat_to_up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25"
    },
    {
      "chain": true,
      "t": "up_25_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_right_bank"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_helix_up_large"
    },
    {
      "chain": true,
      "t": "right_bank_to_flat"
    },
    {
      "chain": true,
      "t": "flat_to_left_bank"
    },
    {
      "chain": true,
      "t": "left_helix_up_small"
    },
    {
      "chain": true,
      "t": "left_helix_up_small"
    },
    {
      "chain": true,
      "t": "left_bank_to_flat"
    },
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat",
    "flat_to_down_25",
    "down_25_to_down_60",
    "down_60",
    "down_60",
    "down_60",
    "down_60",
    "down_60",
    "down_60_to_down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "flat_to_up_25",
    "up_25",
    "up_25_to_flat",
    "flat_to_down_25",
    "down_25",
    "down_25_to_flat",
    "s_bend_left",
    "s_bend_right",
    "brakes",
    "brakes",
    "brakes",
    "flat_to_left_bank",
    "banked_left_turn_5",
    "banked_left_turn_5",
    "left_bank_to_flat"
  ],
  "ride_type": 52,
  "start": {
    "dir": 2,
    "x": 30,
    "y": 30
  }
}
park screenshot, claude-sonnet-5 round 6 view 1

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