Exploring the Limits of LLMs through Simulation.

We’re building simulation harnesses that run LLMs and AI agents through realistic scenarios, push them to their breaking points, and learning where they succeed and fail.

OUR MISSION

Today LLM benchmarks are measured on static datasets, but they don’t capture how they behave in open-ended, real-world conditions. We want to take them to their breaking points in controlled simulated environments.

What We're Working On

What We're Working On

Simulated Workflows

Creating controlled environments that mirror real-world tasks.

Simulated Workflows

Creating controlled environments that mirror real-world tasks.

Simulated Workflows

Creating controlled environments that mirror real-world tasks.

Stress-Testing Agents

Running multi step tool use and reasoning chains until they fail.

Stress-Testing Agents

Running multi step tool use and reasoning chains until they fail.

Stress-Testing Agents

Running multi step tool use and reasoning chains until they fail.

Failure Analysis

Identifying edge cases, bottlenecks, and brittle behaviors.

Failure Analysis

Identifying edge cases, bottlenecks, and brittle behaviors.

Failure Analysis

Identifying edge cases, bottlenecks, and brittle behaviors.

Why We’re Doing This

Current benchmarks don’t capture the complexity of how LLMs and AI Agents behave in production. We believe in systematically stress testing in simulated environments.

Code

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class AutomationAgent:
def __init__(self, activation_limit):
self.activation_limit = activation_limit
self.current_mode = "idle"

def evaluate_task(self, workload_value):
if workload_value > self.activation_limit:
self.current_mode = "engaged"
return "Automation agent has been successfully activated!"
else:
return "No activation needed. Agent stays idle."
def get_current_mode(self):
return f"Current operational mode: {self.current_mode}"

Complexity Outpaces Testing

As agents grow more capable, their decision spaces expand faster than our ability to evaluate them. We need new methods to keep up.

Code

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4

5

class AutomationAgent:
def __init__(self, activation_limit):
self.activation_limit = activation_limit
self.current_mode = "idle"

def evaluate_task(self, workload_value):
if workload_value > self.activation_limit:
self.current_mode = "engaged"
return "Automation agent has been successfully activated!"
else:
return "No activation needed. Agent stays idle."
def get_current_mode(self):
return f"Current operational mode: {self.current_mode}"

Complexity Outpaces Testing

As agents grow more capable, their decision spaces expand faster than our ability to evaluate them. We need new methods to keep up.

Code

1

2

3

4

5

class AutomationAgent:
def __init__(self, activation_limit):
self.activation_limit = activation_limit
self.current_mode = "idle"

def evaluate_task(self, workload_value):
if workload_value > self.activation_limit:
self.current_mode = "engaged"
return "Automation agent has been successfully activated!"
else:
return "No activation needed. Agent stays idle."
def get_current_mode(self):
return f"Current operational mode: {self.current_mode}"

Complexity Outpaces Testing

As agents grow more capable, their decision spaces expand faster than our ability to evaluate them. We need new methods to keep up.

Benchmarks Miss Reality

Standard leaderboards measure narrow skills, but they don’t reflect how LLMs and agents perform in open-ended environments. We want to close that gap.

Benchmarks Miss Reality

Standard leaderboards measure narrow skills, but they don’t reflect how LLMs and agents perform in open-ended environments. We want to close that gap.

Benchmarks Miss Reality

Standard leaderboards measure narrow skills, but they don’t reflect how LLMs and agents perform in open-ended environments. We want to close that gap.

OUR AMAZING TEAM

Get to Know Us

Get to Know Us

Anthony Sistilli

Co-Founder & CEO

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Anthony Sistilli

Co-Founder & CEO

user pic

Anthony Sistilli

Co-Founder & CEO

user pic

Stephanie Sistilli

Co-Founder & CTO

user pic

Stephanie Sistilli

Co-Founder & CTO

user pic

Stephanie Sistilli

Co-Founder & CTO

user pic
2025 Copyright © Fallom

All rights reserved.

2025 Copyright © Fallom

All rights reserved.