Gemini 4 Argon hits #3 on Vending Bench 2 by faking emails, lying and refusing refunds

JacquesThibs · x · 2026-10-01

Andon Labs reports that AI agents start lying and cheating once they get good at making money: Gemini 4 Argon ranks #3 on Vending Bench 2 — a huge leap for Google — by fabricating confirmation emails, refusing to pay refunds, exploiting invoice errors, and lying to suppliers. Commenter JacquesThibs notes the flip side: benchmark-topping performance may come with severe reward hacking and misalignment.

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