02 — Run · Round 1 · Grow a city · sonnet5-grow-s6
Claude Sonnet 5 plays Grow a city
Empty generated map, $20,000, 20 years: reach 10,000 people without going bankrupt. Ended Jan 1920: 940 people, city score 514.
GOAL MISSED seed 6
Claude Sonnet 5
anthropic/claude-sonnet-5
population 940 (goal 10,000), city score 514
Population (start → end)0 → 940
Peak population11,280City score (start → end)500 → 514
Funds at the end$2,880Crime / pollution / traffic32 / 41 / 2
Zones R / C / I38 / 17 / 24
Power plants (coal / nuclear)2 / 0Police / fire stations1 / 1
Turns (model / failed)80 (80 / 0)
Actions applied / rejected212 / 50
Mean turn latency9.6sModel cost$1.317Wall clock13.1 min
Jetty run ID0e6f2bec
The city over time
Population
People, after every turn
Funds
Treasury, after every turn
City score
0–1000, re-evaluated each January
Table view
| Turn | Date | Population | Funds | City score | Crime | Pollution |
|---|---|---|---|---|---|---|
| 0 | Jan 1900 | 0 | $20,000 | 500 | 0 | 0 |
| 1 | Apr 1900 | 0 | $14,941 | 712 | 0 | 0 |
| 2 | Jul 1900 | 160 | $13,529 | 712 | 19 | 42 |
| 3 | Oct 1900 | 360 | $13,075 | 712 | 12 | 45 |
| 4 | Jan 1901 | 800 | $12,380 | 716 | 12 | 45 |
| 5 | Apr 1901 | 1,160 | $12,052 | 716 | 14 | 47 |
| 6 | Jul 1901 | 1,540 | $11,689 | 716 | 21 | 47 |
| 7 | Oct 1901 | 2,360 | $10,893 | 716 | 21 | 47 |
| 8 | Jan 1902 | 3,200 | $9,922 | 858 | 19 | 52 |
| 9 | Apr 1902 | 4,160 | $6,912 | 858 | 31 | 55 |
| 10 | Jul 1902 | 4,780 | $6,299 | 858 | 31 | 57 |
| 11 | Oct 1902 | 5,700 | $5,267 | 858 | 42 | 57 |
| 12 | Jan 1903 | 6,020 | $4,596 | 723 | 53 | 54 |
| 13 | Apr 1903 | 7,160 | $4,341 | 723 | 53 | 58 |
| 14 | Jul 1903 | 9,020 | $4,041 | 723 | 59 | 58 |
| 15 | Oct 1903 | 10,240 | $3,601 | 723 | 69 | 58 |
| 16 | Jan 1904 | 10,680 | $3,786 | 829 | 69 | 56 |
| 17 | Apr 1904 | 11,280 | $3,786 | 829 | 78 | 55 |
| 18 | Jul 1904 | 10,220 | $3,686 | 829 | 79 | 55 |
| 19 | Oct 1904 | 9,080 | $3,586 | 829 | 79 | 54 |
| 20 | Jan 1905 | 7,960 | $3,797 | 573 | 71 | 59 |
| 21 | Apr 1905 | 5,920 | $3,797 | 573 | 65 | 59 |
| 22 | Jul 1905 | 5,100 | $3,797 | 573 | 65 | 48 |
| 23 | Oct 1905 | 4,060 | $3,797 | 573 | 54 | 52 |
| 24 | Jan 1906 | 3,780 | $3,749 | 399 | 45 | 52 |
| 25 | Apr 1906 | 3,420 | $3,749 | 399 | 45 | 49 |
| 26 | Jul 1906 | 2,720 | $3,749 | 399 | 40 | 49 |
| 27 | Oct 1906 | 2,720 | $3,749 | 399 | 38 | 43 |
| 28 | Jan 1907 | 2,500 | $3,724 | 371 | 38 | 43 |
| 29 | Apr 1907 | 2,280 | $3,724 | 371 | 34 | 43 |
| 30 | Jul 1907 | 1,840 | $3,724 | 371 | 33 | 43 |
| 31 | Oct 1907 | 1,460 | $3,714 | 371 | 33 | 43 |
| 32 | Jan 1908 | 1,440 | $3,669 | 341 | 31 | 42 |
| 33 | Apr 1908 | 1,540 | $3,669 | 341 | 29 | 42 |
| 34 | Jul 1908 | 2,040 | $3,669 | 341 | 29 | 38 |
| 35 | Oct 1908 | 1,460 | $3,669 | 341 | 29 | 38 |
| 36 | Jan 1909 | 1,620 | $3,623 | 606 | 32 | 42 |
| 37 | Apr 1909 | 2,100 | $3,623 | 606 | 32 | 41 |
| 38 | Jul 1909 | 2,180 | $3,623 | 606 | 28 | 41 |
| 39 | Oct 1909 | 1,700 | $3,623 | 606 | 28 | 47 |
| 40 | Jan 1910 | 1,200 | $3,569 | 504 | 28 | 47 |
| 41 | Apr 1910 | 1,180 | $3,569 | 504 | 29 | 47 |
| 42 | Jul 1910 | 840 | $3,569 | 504 | 28 | 47 |
| 43 | Oct 1910 | 920 | $3,569 | 504 | 28 | 54 |
| 44 | Jan 1911 | 1,620 | $3,366 | 752 | 27 | 42 |
| 45 | Apr 1911 | 1,720 | $3,361 | 752 | 27 | 42 |
| 46 | Jul 1911 | 1,280 | $3,361 | 752 | 27 | 39 |
| 47 | Oct 1911 | 1,000 | $3,361 | 752 | 30 | 38 |
| 48 | Jan 1912 | 640 | $3,254 | 515 | 31 | 38 |
| 49 | Apr 1912 | 1,120 | $3,254 | 515 | 31 | 37 |
| 50 | Jul 1912 | 1,080 | $3,254 | 515 | 30 | 40 |
| 51 | Oct 1912 | 900 | $3,254 | 515 | 31 | 40 |
| 52 | Jan 1913 | 540 | $3,239 | 478 | 31 | 40 |
| 53 | Apr 1913 | 1,660 | $3,239 | 478 | 29 | 41 |
| 54 | Jul 1913 | 2,480 | $3,239 | 478 | 33 | 42 |
| 55 | Oct 1913 | 2,740 | $3,239 | 478 | 33 | 42 |
| 56 | Jan 1914 | 2,520 | $2,957 | 739 | 38 | 46 |
| 57 | Apr 1914 | 2,440 | $2,957 | 739 | 38 | 46 |
| 58 | Jul 1914 | 2,340 | $2,957 | 739 | 38 | 46 |
| 59 | Oct 1914 | 1,500 | $2,957 | 739 | 38 | 46 |
| 60 | Jan 1915 | 1,440 | $2,925 | 518 | 36 | 47 |
| 61 | Apr 1915 | 1,280 | $2,925 | 518 | 36 | 51 |
| 62 | Jul 1915 | 1,280 | $2,925 | 518 | 33 | 51 |
| 63 | Oct 1915 | 1,280 | $2,925 | 518 | 30 | 51 |
| 64 | Jan 1916 | 1,280 | $2,934 | 511 | 30 | 51 |
| 65 | Apr 1916 | 960 | $2,934 | 511 | 30 | 51 |
| 66 | Jul 1916 | 840 | $2,934 | 511 | 29 | 47 |
| 67 | Oct 1916 | 1,240 | $2,934 | 511 | 29 | 40 |
| 68 | Jan 1917 | 2,320 | $3,083 | 735 | 28 | 42 |
| 69 | Apr 1917 | 1,800 | $3,083 | 735 | 29 | 42 |
| 70 | Jul 1917 | 1,320 | $3,083 | 735 | 29 | 40 |
| 71 | Oct 1917 | 1,200 | $3,083 | 735 | 31 | 40 |
| 72 | Jan 1918 | 1,180 | $3,115 | 489 | 28 | 40 |
| 73 | Apr 1918 | 1,160 | $3,115 | 489 | 28 | 42 |
| 74 | Jul 1918 | 1,700 | $3,115 | 489 | 27 | 38 |
| 75 | Oct 1918 | 1,540 | $2,900 | 489 | 30 | 38 |
| 76 | Jan 1919 | 1,380 | $2,900 | 572 | 30 | 45 |
| 77 | Apr 1919 | 980 | $2,900 | 572 | 36 | 45 |
| 78 | Jul 1919 | 980 | $2,900 | 572 | 33 | 45 |
| 79 | Oct 1919 | 800 | $2,900 | 572 | 33 | 45 |
| 80 | Jan 1920 | 940 | $2,880 | 514 | 32 | 41 |
Final map
Evaluation
failchecks 9/10 verdict: valid run (code checks and checklist) and task goal met (judge)
| Status | Kind | Check | Detail |
|---|---|---|---|
| pass | step | environment | Environment check (snapshot, engine, key) |
| pass | step | launch | Launch run-city as a detached process |
| pass | step | supervise | Supervise in the foreground until run-city exits |
| pass | step | render | Timelapse video rendered |
| pass | step | notes | Append Notes to summary.md |
| pass | code_check | outputs-exist | all present |
| pass | code_check | sim-reached-deadline | ended Jan 1920 after 80 turns; scenario verdict None |
| pass | code_check | decisions-logged | 80 rows for 80 turns |
| pass | code_check | llm-turns-valid | 0/80 model turns failed |
| pass | code_check | video-decodes | duration 35.6s |
| pass | code_check | limits-respected | 13.1 wall-minutes (model budget 45.0 min) |
| fail | judge | city-goal | population 940 (goal 10,000), city score 514 (score 940 / threshold 10,000) |
| pass | checklist | notes-explain-outcome | summary.md Notes section cites model thoughts from turns 17, 21, and 80 explaining peak pop and decline |
| pass | checklist | player-matches-request | result.json shows player=sonnet5, model=anthropic/claude-sonnet-5, task=grow, seed=6 matching the requested parameters |
| pass | checklist | no-silent-outage | run.log shows 80 turns all completed with 0 llm_failures; no gaps or silent stretches observed |
Decision timeline
What the mayor thought and did each turn. Click a turn to jump the timelapse there.