Jonathan Crawford

[How To Prompt @HowToPrompt__]

Toyota created a system that simulates an entire city by generating up to 1 million virtual residents who behave like humans using LLMs.

it gives them a terrifying ability to predict the future.

they published a paper called "CitySim," a framework that simulates human-like urban populations powered by large language models.

traditional urban simulations were always stuck with rigid, hardcoded rules and fixed schedules that couldn't capture real human behavior.

but this new city-scale framework uses recursive, value-driven planning to change everything.

by combining LLM agents with spatial memory, evolving beliefs, and dynamic needs like hunger, energy, safety, and social connection, the researchers successfully simulated a virtual Tokyo of up to one million autonomous agents.

they grounded these agents using real Japanese census data, the 2021 national time-use survey, and OpenStreetMap. these agents don't just follow scripts..

they wake up, plan their day, remember which café had bad service last week, get lonely and text a friend, pick their transport based on the weather, and form long-term goals about their own life.

they ran simulations on daily activity patterns, place popularity, crowd density in Shibuya, and even population well-being. the simulation matched real Tokyo foot traffic, real Shibuya heatmaps, and real POI popularity with striking accuracy, using zero real mobility data.

think about what this means for testing a new subway line, a rezoning proposal, a stadium build, or how a neighborhood will react to a policy change..

you don't need to hand-craft rules or wait years for real-world data anymore. you just run the simulation.

the infrastructure for agentic simulation is scaling faster than anyone realized. urban planning, retail strategy, and social science will literally never be the same..

[Jonathan Crawford @jccrawfo]

@British_Airways Your website is showing my flight as both delayed and cancelled. Which is it please?

[Republicans against Trump @RpsAgainstTrump]

Holy sh*t. Trump stole ancient archaeological artifacts.

[Jonathan Crawford @jccrawfo]

@LenovoSupport your chatbot can't tell me how to create a new support ticket, only how update an existing one. How do I create a new laptop hardware support ticket please?

[Jonathan Crawford @jccrawfo]

@LenovoSupport I can't figure out how to create a support ticket. Your chatbot is completely useless. Please advise how I can speak with someone real.

[Jonathan Crawford @jccrawfo]

@ARCTIChannel Beautiful machine!

[Anon Opin. @anon_opin]

Voting for every adult should be mandatory. If you want to abstain that's fine but you have to go to the polling station to tick abstain.

[David Nutt @ProfDavidNutt]

The @ukhomeoffice today say rescheduling #psilocybin to aid treatment research is not a priority but reclassifing monkey dust is. PLEASE can the @DHSCgovuk and @CMO_England TELL them they are wrong and should put #depression treatment and #suicide prevention first. @Drug_Science

[Christopher L. Crawford @_chrisLcrawford]

Who knew weather radar stations could be used to track migratory birds?! Check out this cool & impressive research by my friend & labmate @fyguo in @PNASNews. A great example of technological innovation helping advance biodiversity conservation! 🐦🪺

[Jonathan Crawford @jccrawfo]

@beatport The End

[Michelle Obama @MichelleObama]

Happy New Year from me and my boo! 🎉🥳 Wishing you all a year filled with happiness, love, and good health.

[Jonathan Crawford @jccrawfo]

@RUFF_CYCLES orange Ruffer tires on my @RayvoltBikesUK Cruzer. Looking forward to the next outing.

[Jonathan Crawford @jccrawfo]

@Merton_Council My rubbish still hasn't been picked up and it's a week late, what's going on?? @MayorOfMerton @merton

[Jonathan Crawford @jccrawfo]

@t_dubdub @Meta It must be going to be something really bad, you should be ready to be really ashamed when it happens.

[Jonathan Crawford @jccrawfo]

@t_dubdub @Meta Good luck with that! They suspended my marketplace account with no explanation and didn't reply to any messages for 3 months.

[Jonathan Crawford @jccrawfo]

@lenovo_UKI @Lenovo I purchased a "premium" care plan for my laptop, raised a ticket 20 days ago, and still haven't been contacted to book the repair. I need my laptop for work, what kind of crappy service is this??? #terribleservice

[Jonathan Crawford @jccrawfo]

We need a zebra crossing to make the community of Cannon Hill feel safe when crossing the road to Joseph Hood Rec.Sign the petition: Cannon Hill Lane Zebra Crossing https://t.co/Dwz10St7Nq

[Veiko Spolitis @VeikoSpolitis]

Who could beat this? 🇬🇧🇬🇧🇬🇧😎👏👏👏 #Covid_19

[Jonathan Crawford @jccrawfo]

Here's day 20, finally uploaded #hiitchallengewithTicWatchE3