World0™ Discuss an environment

Simulation infrastructure for agent builders

Infrastructure for training and evaluating AI agents.

World0 builds synthetic environments where AI agents can practise real tasks, be evaluated and improve.

From security and pricing systems to business workflows, shape the world around the agent you’re building.

For teams building and deploying AI agents.

Worlds with state and rulesScenarios around real tasksFeedback for evaluation and training

01 / Built around your agent

Different agents.
Different worlds.

Start with the task and operating context. Build the environment, scenarios and feedback around the agent.

01 / Security

Security agent builders

Design an environment around the systems, signals and response choices your agent needs to handle.

Scope your environment

02 / Pricing

Pricing system deployers

Explore pricing policies, market interactions and operating constraints in synthetic markets.

Explore pricing research

03 / Workflows

Business-workflow builders

Recreate applications, records and rules for agents that carry out work through browsers and tools.

See recorded workflows

Explore current work

Browser workflows in practice.

Two recorded environments show how agents work through applications, shared state and operating rules.

01

Payments

Recorded workflow
Cash application workspace with an authoritative posting and no remaining unapplied amount.

Apply a payment correctly.

Read the remittance, check the invoice and balance, obtain approval, post the allocation and verify the result.

Source documentsApproval rulesLedger state
02

Service desk

Recorded workflow
Service-desk agent workspace showing approval, a loaner reservation and a scheduled pickup. Physical handoff is pending.

Coordinate a temporary laptop.

Check the request and inventory, agree the allocation, obtain approval and reconcile the reservation across two agent roles.

Changing requestsShared inventoryAgent coordination

Both workspaces use synthetic business data. The service-desk recording ends with a reservation and scheduled pickup; physical handoff remains pending.

02 / See the work

From a task
to a trace
you can inspect.

Watch world setup, browser agents at work and a historical API training study.

FULL WALKTHROUGH / 2:02

Read the video transcript

Testing an agent once doesn’t tell you how it will handle real work.

World0 creates synthetic versions of the applications your agents need to work in. AI agents practise real jobs inside them, and we use feedback from those runs to train them to do those jobs better. Here, we’re demonstrating payments and an IT service desk. Now watch recorded agent workflows.

First, cash application. The agent opens Maple Supply’s payment and checks the assigned task.

It reads the original remittance to identify the invoice.

It checks the current invoice and outstanding balance.

Then it prepares the allocation, using the source evidence and the exact amount on the invoice.

Staff approval is required before submission. The agent submits once.

It verifies the authoritative posting and checks the remaining balance.

Applied in full. Nothing remains unapplied.

In our payments training run, outcome feedback drove one reinforcement-learning update. We then evaluated the updated model on the same cases.

The recovered summary reports ten successes out of sixteen, up from seven, with six recoveries and three regressions. Twelve cases were independently checked.

Run, evaluate, train and test again, measuring gains and checking regressions.

A second world tests two-agent coordination.

The stockroom proposes a laptop and later pickup.

The service-desk agent gets acceptance and approval,

then books it.

Both roles reconcile the reservation.

That’s World0: a workplace to practice, checked results, and evidence to improve your agent.

Recorded payments and service-desk workflows. The historical API study is described in the evidence section ↗.

03 / The infrastructure

Build the world.
Train for the work.

Bring together the environment, scenarios, evaluations and feedback your agent needs. Work with us from environment design through targeted improvement.

01

Build the world

Map the task, system state, permissions and exceptions. Create the environment and a useful range of tasks.

Environment + scenario set
02

Run the agent

Connect the agent to the agreed browser or tool interfaces. Capture actions, intermediate state and final outcomes.

Runs + inspectable traces
03

Evaluate the work

Design outcome checks and feedback. Identify failures, rule violations and cases that need broader coverage.

Evaluators + failure analysis
04

Improve and retest

Choose prompt, workflow or reinforcement-learning updates to fit the agent. Rerun evaluations and check regressions.

Targeted updates + retest plan

04 / The evidence

Start with work
you can examine.

Explore recorded workflows, a historical training experiment and the research behind our simulations.

Browser workflows

Payments and service-desk recordings show agents using the interfaces and reconciling task outcomes.

Watch the recorded work

Historical API experiment

A payments experiment explored one reinforcement-learning update and a repeat evaluation.

Read the result and scope

The saved summary reports 7 successes out of 16 before the update and 10 out of 16 after it, with six recoveries and three regressions. Twelve raw cases were independently rescored.

This historical Qwen experiment used API tools and the same evaluation cases before and after training. It did not test browser-agent training, held-out generalization or production transfer.

Broader simulation research

Explore World0’s existing studies and their measurement scope alongside the current workflow demonstrations.

Read the research

05 / Simulation research

Follow decisions.
Measure what changes.

World0’s pricing research examines agent behavior, model choice, shared systems and configuration in synthetic markets.

These studies inform how we design scenarios, evaluate agent behavior and select changes to test. Each finding retains its original method, scope and research record.

Explore the research

Start with your agent

What should your
agent learn to do?

Tell us what you’re building and the outcome that matters. We’ll discuss the environment, scenarios, evaluation and improvement work it would take.

Talk to World0