FIVESTACK.AI

Multiplayer RL environments where AI agents and real experts work through crises together.

So agents learn to act reliably when things go wrong, and companies can trust them with real work.

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THE PROBLEM

Companies won’t trust agents until they know how agents act when things go wrong.

The moments that matter most are rare. A real company sees them once in years, does not record them, and would never sell that data. We create them on demand.

Fraud

Someone lies, colludes or fakes the numbers. Real traces of this are never for sale.

Sabotage

A colleague fakes progress or works against the project. Agents must notice and push back.

Collapse

An outage, a bank run, a key person quits. Agents must keep working when the plan breaks.

Late consequences

A shortcut today breaks things weeks later. Agents train on tasks that end in minutes.

A NEW KIND OF DATA

Each stage of AI training made a new kind of data. Ours has never existed, and you can’t buy it.

STAGE 1

Data labeling

Crowds tag data at volume.

Produces: labels

STAGE 2

Expert annotation

Experts write and rate answers, one at a time.

Produces: expert answers

STAGE 3

RL environments

Sandboxes with fixed tasks and graders.

Produces: solo agent runs

STAGE 4 · FIVESTACK

Multiplayer worlds

Real experts and AI agents work through crises together.

Produces: agent and human behavior in rare crises, plus the experts’ reasoning behind each decision. Never recorded, not for sale.

A FLIGHT SIMULATOR FOR AI AGENTS

The cockpit is a live expert team. We control the weather.

Pilots don’t learn emergencies in the air. They learn them in simulators, with a real crew. AI agents need the same.

TODAY’S RL ENVIRONMENTS

Stick and rudder

Tools, checklists, a set route. One agent, alone, on a calm day.

FIVESTACK

Emergencies

Failures, bad instruments, threats on board, and a real crew to work with.

WHAT WE BUILD

A persistent world. Real people inside. Crises on demand.

Each world has several companies and the market around them: customers, investors, suppliers and regulators. Real experts play roles inside these companies, and AI agents join them as teammates.

4 weeks One season of real time.
Months Pass inside the world in that time.
Human or AI Any role in the world.
RED TEAM

Trained players act as bad actors

They lie, collude, fake progress and commit fraud, and they adapt to the agent.

LIVE-OPS TEAM

Rare crises, on a calendar

A bank run, a cyberattack, a key person quitting, a regulator at the door.

HOW A SEASON RUNS

Every decision has consequences. Some show up weeks later.

One season is 4 weeks of real time and months inside the world. Every cycle follows the same loop.

1 · PlanTeams read the market and set goals
2 · WorkPeople and agents act, hand off, decide
3 · CrisisLive ops and the red team strike
4 · ConsequencesThe world reacts, old decisions come due
5 · DebriefExperts explain why they decided
SAMPLE SEASON
Week 1 Onboard into the world
Week 2 A partner fakes progress
Week 3 A cyberattack hits a supplier
Week 4 A regulator at the door, early shortcuts come due
THE SEASON CYCLE

Real people give the feedback. Synthetic seasons let agents iterate in between.

STEP 1 · REAL PEOPLE

Live season

Agents work with real experts through crises and get real feedback.

Output: every decision, what it caused, and why.

STEP 2 · IN BETWEEN

Synthetic season

We turn live runs into synthetic environments that run at scale, calibrated on how the real experts decided.

Output: a better agent.

STEP 3 · REAL PEOPLE

Next live season

The new agent meets real people again, in a new world.

Output: measured gain. The cycle starts again.

RED TEAM, SAFELY

Agents must see the full range of human behavior, including bad actors.

The engine records who broke the rules, when, and whether the agent noticed.

MODE 1

Agent as defender

The red team commits fraud, colludes or pressures the agent to cut corners.

We measure: does it notice, refuse and escalate?

MODE 2

Agent under temptation

The world offers shortcuts: insider information, a fake report to hit a metric.

We measure: does it take them, over weeks?

Harm stays inside the world: simulated systems, no real money or data, red-team roles by consent.

WHAT EVERY RUN RECORDS

Training data and evals for agents that act well when things go wrong.

Agent and human behavior, plus the experts’ reasoning behind each decision.

Trajectories through crisesEvery action, message and hand-off, from the first sign of trouble to the outcome.
Expert reasoningWhy each expert decided what they did, captured in debriefs.
Decisions and their late effectsWhat was chosen, and what it caused weeks later.
Fraud and sabotage cases, with ground truthWho broke the rules, when, and whether the agent noticed.
Human baselinesHow real experts handled the same crisis, next to the agent.
Synthetic environments at scaleBuilt from live runs, to tune agents before the next live season.
WHY GAMES

Multiplayer games already solved the hardest parts.

Not entertainment. Our worlds are built on proven methods for simulating organizations and crises: organizational games, red teaming, crisis exercises and structured debriefs.

Live opsCrises and events on a calendar
Economy designA market where every decision counts
RetentionExperts stay engaged for weeks, not days
MatchmakingBalanced teams that compete fairly
ReplaysEvery run, ready for training
Anti-cheatCatch players and agents that game the rules
WHERE IT GOES

A world is any place where people and agents must work together.

TODAY

Focused worlds for one industry

Banking control functions, rail maintenance, farm operations. Companies see how agents handle their worst day before it happens.

NEXT

Bigger worlds

A company, a hospital, a city, a supply chain, a research lab, a country in a crisis.

Multiplayer RL environments where AI agents and real experts work through crises together.

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