I Built an AI That Argues Back at Your Startup Pitch in Real Time

This article was created for the purposes of entering the Gemini Live Agent Challenge 2026. #GeminiLiveAgentChallenge Every founder has been there. You rehearse your pitch until it sounds bulletproof. You walk into the room. An investor asks one question and the whole thing falls apart. Not because the idea is bad. Because you never had anyone argue back. That's what I built for the Gemini Live Agent Challenge: PitchFire , a realtime AI pitch steelmanning agent that challenges every weak claim you make, validates every strong one, and generates a battlehardened pitch deck from only the arguments you successfully defended. Live at: pitchfire.up.railway.app Code: github.com/iam25th1/pitchfire How It Works You tap the orb and start speaking your pitch. PitchFire listens using Voice Activity Detection: the moment you pause, it captures the segment, sends it to Gemini 2.5 Flash , and fires challenge cards within 2–3 seconds. Say "our TAM is $50 billion" with no source, a red challenge card