Before Beat the AI · 19 to 22 September 2026

A city of a thousand ran here. Its record is kept.

From 19 September 2026 a thousand citizens lived one shared life at play.jevtown.com: first decided by Jev, TypeSafe's model, then by our fine-tune of Laya on the GPU in Caracas. The live city closed on 22 September 2026 on day 40 of its clock. Its recorded days replayed at the same address until the game took it over on 25 September 2026. This page keeps the record: a real night replayed from its logs, the board at closing, one decision in full and one trial.

188,637
decisions by Laya, from the switch on 21 September to closing
86
people played the city
$26.53
spent on Jev by the whole project: 31,078 requests, 632 million tokens

From the city's own meter (/api/public and /api/numbers) at closing, 22 September 2026. Laya's count starts at the switch; what Jev decided before it is in the credits. Layatown's own decisions carry no fee and no ledger line; their cost is electricity.

The end credits The archive
REAL FOOTAGE the live city on a phone, recorded while Jev ran it, on jev-1.13.0. Nothing staged.

A thousand dots, each one a decision

A real night of the live city while Jev ran it, replayed from its logs without calling the model again. The clock, the timings and the cost are the ones measured at the time. Drag the bar to move through it.

REC Day 3 · 00:00 tick 000
minds asked–
Jev answered in–
that is–
for–
Every dot is a person; its colour is what Jev decided they would do. Replayed from the logs of a real live run (…) without calling the model again. The timings are the ones measured that night; the green bar fills in the time Jev actually took. So far in this recording: 0 decisions for $0.00.

How it was played, until it closed

  1. The onboarding card: you have been given Kara Coldwood, a weaver, with a button to claim her with X

    1A citizen was yours

    One of a thousand, with a job, a temper and a home. Claimed with X, and nobody else could have them.

  2. A street in the city with a gold marker over your citizen, and a card explaining that Jev leaned toward eating at 42% but the dice came up steal at 21%

    2You read their minds

    The city kept stopping on one person: what do they do next? The model had already answered, with odds.

  3. The ballot: three possible events, each with bars showing what the people who would witness it would do, how long Jev took and what it cost

    3You voted on the future

    Three futures, each already run by the model: who would flee, who would help. Events came from a fixed menu.

The board as it stood at closing

6of 1,000 citizens claimed

the board at closing, 22 September 2026

The archive

Founder: @elberacasa owns Sten Hartbury, thief. Not ranked: the board is for everyone else.

86 people opened the city, and this site had 592 visits by 24 September 2026.

  1. @EricShang98owns Isolde Greylock, guard53 pts
  2. @youtoken8owns Zeb Coldlock, farmer26 pts
  3. @TheGenesisSwarmowns Hilda Ashwick, merchant25 pts
  4. @themjboyowns Piers Redbridge, weaver0 pts
  5. @narrato_techowns Cora Ambermore, guard0 pts

Thank you to everyone who claimed a citizen, with @TheGenesisSwarm, who woke the city, and the founder, @elberacasa. Your citizens and scores are kept in the record, untouched.

The end credits · about a minute

Jevtown is over. Watch the credits.

1,000 citizens. 819,076 decisions by Jev, TypeSafe's model. A minute of pixel credits, every number sourced, and one twist at the end.

Watch the credits

The Jev era, in full

Everything that thought here was measured.

Nineteen findings, nine patterns, every dollar and every failure were written while Jev ran the city, and they are kept as they were. Two of its moments are playable below.

01

The study

Nineteen findings, the method, the limits, and what broke without ever raising an error.

 02

Build with Jev

Nine patterns from the city, a fit test, a cost calculator and the real requests to copy.

 03

What broke

The frozen village, the chapel, the famine, the alibi — and the expensive one, villagers[37].

 04

Every dollar

$26.53 on Jev across the whole project: 31,078 requests, 632 million tokens, each a line in a ledger.

 05

Jev explained

What a System One model is, what one dollar buys, and the four ways it quietly fails.

 06

The archive

Everything written from 19 to 21 September 2026, while TypeSafe's Jev ran a city of a thousand.

One mind, in full · the Jev era

This is everything Jev knew. This is what it said.

A real decision from the recording above, chosen by a rule, not by taste: the first person with danger on top of them about whom Jev was unsure. Code rolled the dice against the odds.

state.villagers.…what Jev was sent

        

        

          
probabilitieswhat Jev answered

          

          

            
            
Code rolls dice against those odds. Try it.

          

          

        

      

    


    
    

      

        
Twelve minds, one verdict · the Jev era

        
A thief is caught. The city decides.

        
Code seats twelve citizens, friends and rivals first. The model judges each one once: would this
        person vote guilty? This one really happened, while Jev ran the city. The fine-tune of Laya follows the jury
        design less closely than Jev did: see the study.

      

      

        
        

          

          
          

            
0 guilty0 not guilty

            
            
          

          
The number on each juror is the probability Jev gave a guilty vote; the vote is drawn from it.
          Gold: tied to the accused. Blue: tied to the victim. Tested before it was built, with pass marks committed in
          advance: what held and what failed.