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Simile
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Simile
@simile_ai
Building a multiverse through AI simulation
Katılım Mayıs 2025
9 Takip Edilen12.2K Takipçiler
Simile retweetledi
I think it’s pretty clear that simulation is the next frontier for AI.
The most impressive feats of AI to date are when we have a clear environment + reward, whether it be beating Le Sedol at Go, winning an IMO gold medal, or writing entire apps from scratch. In these cases, the RL algorithm can try different actions, and observe the well-defined consequences in the safety of a docker container.
But what about messy real-world situations involving people? The rewards are unclear, the stakes are high, and you can’t experiment in the real world. But these situations are precisely where the next big opportunity in AI is. To crack this, we need to *simulate* society (“put society into a docker container”). Concretely, this means building a model that can predict what will happen in any given situation (real or hypothetical). If we can do this, we are only limited by our imagination: predict the future, optimize for better outcomes, answer hypothetical (“what if”) questions. Ultimately, this goes beyond making better decisions, but it’s about giving us a better understanding of ourselves and the world.
Simulation is the whole enchilada. And this is exactly the research that @simile_ai is working on. Read more here:
simile.ai/blog/simulatio…
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Simile retweetledi
Simulating humans is such an interesting and useful problem but very comps, if anyone can do it it’s this team @joon_s_pk @percyliang @msbernst
Joon Sung Park@joon_s_pk
Introducing Simile. Simulating human behavior is one of the most consequential and technically difficult problems of our time. We raised $100M from Index, Hanabi, A* BCV, @karpathy @drfeifei @adamdangelo @rauchg @scottbelsky among others.
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Our work on generative agents showed that it's possible to accurately simulate human behavior by capturing rich information about real people.
@joon_s_pk spoke with @Nature about how our work builds on this research, and how enterprises can now use simulations to test decisions before they hit the real world:
nature.com/articles/d4158…
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Simile retweetledi
Exciting to see @WSJ cover what we’re building at
@simile_ai.
It’s great to see the technology we developed in the lab making real world impact alongside foundational institutions like CVS and Gallup. Nothing like frontier research meeting real PMF!
wsj.com/cio-journal/ca…
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Simile is increasing decision-making capacity and decreasing research time. We are proud to work with partners like @CVSHealth! 🤝
Projects that took months are now taking hours, and studies are closer resembling human behavior than prior self-reported research - all with the goal of providing the best products and services for customers at companies like CVS Health, where the customer is centered in every decision.
Read more in the CVS Health whitepaper below.
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Happy Valentine’s Day from Team Simile!
Fun fact: In our founders’ 2023 paper, @joon_s_pk and team introduced the concept of generative agents to the world by simulating a town of 25 agents… one of who was planning a Valentine’s Day party.
The agents autonomously spread invitations to the party over the next two days, made new acquaintances, and asked each other out on dates to the party.
This town of agents, Smallville, along with all the flirty festivities, was instrumental in creating the field of AI-based simulation.
Love is in the air! 🎈
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h1 roadmap earth, h2 roadmap mars
TBPN@tbpn
Simile CEO @joon_s_pk says their long-term goal is to simulate all 8 billion people on Earth: He says the real value isn’t just predicting what people will do - but understanding why they do it, referencing a line from the Oracle in The Matrix: ‘You’re not necessarily here to make a decision. You’ve already made the decision. You’re here to understand the decision and why you made it.’” “That captures the essence of simulation. The models we're creating aren't merely trying to predict the future - although we are good at that, and that is one of the core capabilities - but what is more important to me is understanding why we made a decision, and creating these kinds of bottom-up simulations where we can actually go back and trace through the audit logs of how society might unfold.”
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👀 The talent migration into world model companies is noticeable.
Joon Park’s Generative Agents paper was a hinge point for me. It showed so much more than chat interfaces with persistent agents with memory, internal state, relationships, and emergent social dynamics inside a simulated environment.
What struck me most was the implication…if we can encode the structure of social reality into computable environments, experimentation becomes dramatically cheaper. Converting atoms into bytes turns complex human systems into programmable substrates.
I want to spend more time understanding the broader implications of digital world simulation, especially where this intersects with economics, governance, robotics ofc and cognitive architectures.
Substack or paper recommendations welcome 🙏
OG Paper here: arxiv.org/abs/2304.03442
Joon Sung Park@joon_s_pk
Introducing Simile. Simulating human behavior is one of the most consequential and technically difficult problems of our time. We raised $100M from Index, Hanabi, A* BCV, @karpathy @drfeifei @adamdangelo @rauchg @scottbelsky among others.
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Poignant image for a simulation company!
This is a painting by Hieronymus Bosch called “The Garden of Earthly Delights”
It shows the world in mid-creation, with this verse (in Latin): “For when He spoke, the world began. It appeared at His command.”
What you’re looking at is a closed triptych. If you open its panels, the interior is messy and chaotic, showing the full range of humanity with all its grace and folly and desire and excess. Looks like a totally different piece of art
But here on the outside, none of that appears yet! This world has no sun or moon, and it hasn’t been populated
It’s a world with rules and boundaries but otherwise empty, like a blinking cursor on a blank doc, just waiting to be acted upon
I just love it
Simile@simile_ai
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Simile retweetledi
We’re thrilled to lead @simile_ai's $100M Series A!
By building digital twins of real people grounded in real interviews and real data, we believe they’re creating the foundational infrastructure for decision-making in an AI-native world.
Simile@simile_ai
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Generative agents. Foundation models. Some of the core ideas shaping modern AI trace back to Joon Sung Park, Percy Liang, and Michael Bernstein.
Now they’re building Simile - digital twins of people as enterprise infrastructure for decision-making.
Proud to lead their $100M Series A alongside an exceptional group of partners & angels.
Big ambition. Incredible team.
Link: indexventures.com/perspectives/l…
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@simile_ai @ndrewpignanelli can you please prioritize fixing the hitbox to go visit the dino bones! @mihikapoor
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the @simile_ai site is so cute check out this easter egg on submit
Joon Sung Park@joon_s_pk
Introducing Simile. Simulating human behavior is one of the most consequential and technically difficult problems of our time. We raised $100M from Index, Hanabi, A* BCV, @karpathy @drfeifei @adamdangelo @rauchg @scottbelsky among others.
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@simile_ai Congrats @simile_ai team! Simulating behaviors is an amazing opportunity for AI to help our work. Massive research opportunities with immediate application!
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You know something big is happening when @mihikapoor starts building... couple that with groundbreaking Stanford research and a novel application of generative agents to simulate human behavior.
Couldn't be more excited for what's ahead at @simile_ai - and it's extra special if Estela Franca is part of the team!!
Simile@simile_ai
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