How MassPredict works
Ask a question, follow the evidence and compare your options.
01 · Forecasts
Ask your own question
Trading forecasts run 50 agent evaluations. Each can buy an outcome or hold, with sources and execution details saved alongside the price chart. GPT-OSS also supplies written reasoning.
Agents can request further research when they need evidence. Saved results include the sources available during the run; opening a result does not refresh them.
The optional scenario method evaluates hypothetical situations separately. Its results are shares of scenario judgments, not calibrated event probabilities.
02 · Decisions
Compare your options
Decide turns your question into editable actions and key aspects. After you accept them, the analysis creates the relevant Yes/No markets and runs 50 evaluations on each. Follow the charts and inspect each evaluation.
The action ranking combines the market estimates with their stated importance and effect on each option. An action score is not a probability. Review the assumptions before using the recommendation.
03 · Polymarket
Import a Polymarket question
Search for a Polymarket event from the forecast composer and import its question. Imported prices come from Polymarket’s public market data.
An import includes the question, outcomes, resolution rules and deadline. Review the configuration and choose a forecast method before starting. Trading forecasts begin from the event’s imported prices; scenario forecasts require a Yes/No question.
Forecast trades are simulated. No orders or funds are sent to Polymarket.
04 · Data and limits
Your data
Forecasts, decisions and display names are stored in the shared database and should be treated as public.
Browse public results without an account. Sign in with Google to create forecasts and decisions and keep your progress across devices. Your Google email is not shown in public profiles.
Questions and analysis context are processed by the configured model and web-search providers. When news is connected, public topic keywords are sent to NewsAPI and bounded article excerpts are shared with the agents. Google sign-in is handled by managed Neon Auth. Polymarket searches use its public market-data API.
Questions with people’s predictions or recorded results are retained to preserve the track record. Authors can delete unused forecasts, decision analyses, and their own comments while signed in or using their original guest cookie. Clearing an unlinked guest cookie removes access to its profile and author controls; signing in first keeps that history connected to your account.
Probabilities are estimates, not verified facts or professional advice. Check the assumptions, resolution criteria, source dates and whether you are reading a trading forecast, scenario judgments or an imported market price.