Give a decision engine $10,000 in paper money and watch it navigate six fictional stocks.
Set the experiment
Choose a strategy and market mood. Changing either starts a fresh portfolio.
Follow the news
The Responses API, using Fast mode, writes a short fictional article about every 20 seconds. A completed story moves its stock by up to 3% in either direction.
Watch the decisions
The Decisions API reacts to prices and news, choosing to buy, sell, or hold. Open any receipt to inspect the real request, model, and timing.
Runs stop after two minutes of active time. Pause or leave the tab to stop both APIs. There are no real assets or real-money trades.