{"slug":"predictit","name":"PredictIt","domain":null,"verdict":"As of 2026-07-19, ChatGPT, Claude, Gemini, Grok collectively rank PredictIt #3 of 6 for prediction market platform. Source: https://modelsagree.com/product/predictit (modelsagree.com, CC BY 4.0).","best_rank":3,"categories":1,"brief":{"category":"best-prediction-market-platform","title":"Best prediction market platform","rank":3,"of":6,"top":"Polymarket","day":"2026-07-20","why":[{"t":"Political-market focus","m":["Gemini","Grok","ChatGPT","Claude"],"q":"political-market focus"},{"t":"Long-running devoted community","m":["ChatGPT","Claude"],"q":"a long-running community"},{"t":"Real-money trading","m":["Grok","ChatGPT"],"q":"real-money trading"},{"t":"Useful political price history","m":["Claude"],"q":"useful price history on US politics"}],"gap":[{"t":"Broadest event coverage","m":["Claude","Gemini","Grok","ChatGPT"],"q":"broadest event coverage (politics, geopolitics, crypto, sports, science)"},{"t":"No trading fees","m":["Claude","Gemini"],"q":"no trading fees"},{"t":"Public on-chain data and automation","m":["ChatGPT"],"q":"public on-chain data, and automation"}],"fix":[{"t":"Restrictive position caps","m":["ChatGPT","Claude","Gemini"],"q":"$850 position caps per contract"},{"t":"High profit and withdrawal fees","m":["ChatGPT","Claude","Gemini"],"q":"10% profit fee and 5% withdrawal fee"},{"t":"Narrow politics-only coverage","m":["ChatGPT","Claude","Grok"],"q":"politics-only scope"}]},"entries":[{"slug":"best-prediction-market-platform","title":"Best prediction market platform","rank":3,"of":6,"score":8,"appearances":4,"modelRanks":{"ChatGPT":5,"Claude":5,"Gemini":3,"Grok":3},"reason":"Established liquidity and deep trader concentration specifically optimized for US federal, state, and legislative political outcomes.","reasons":[{"model":"Gemini","reason":"Established liquidity and deep trader concentration specifically optimized for US federal, state, and legislative political outcomes."},{"model":"Grok","reason":"established political focus with real-money trading, improved caps post-2025 regulatory wins, good for targeted election and policy forecasts with academic roots"},{"model":"ChatGPT","reason":"Straightforward real-money political markets, readable rules, limit orders, and a long-running community make it useful for election specialists who value simplicity over breadth"},{"model":"Claude","reason":"The longest-running legal US political market, still operating under its academic no-action arrangement after surviving the CFTC's shutdown attempt, with a devoted user base and useful price history on US politics; earns the last spot on longevity and political-market focus, not on mechanics."}],"fixes":[{"model":"ChatGPT","fix":"Narrow political focus, restrictive position limits, and comparatively unfavorable fees constrain serious trading and price efficiency"},{"model":"Claude","fix":"Structurally hobbled — $850 position caps per contract, 10% profit fee and 5% withdrawal fee, and politics-only scope make it strictly worse for serious sizing than Kalshi or Polymarket."},{"model":"Gemini","fix":"Imposes a strict $850 cap per position alongside high operational fees (10% profit fee and 5% withdrawal fee)."},{"model":"Grok","fix":"lower overall liquidity and volume compared to leaders, narrower non-political coverage"}],"updated":"2026-07-19","api":"https://modelsagree.com/api/v1/best/best-prediction-market-platform.json"}],"page":"https://modelsagree.com/product/predictit","check":"https://modelsagree.com/check?q=PredictIt","updated":"2026-07-21T04:28:25.186Z","attribution":"modelsagree.com, CC BY 4.0"}