Argon

Google released Gemini 4 Carbon just two weeks after Argon, positioning it for sustained long-horizon tasks. Early testing shows 0% shortcut rate on Terminal-Bench and 0% prompt-injection success on Gray Swan's benchmark, 2x the secure-code rate of Argon, and 88% vulnerability detection on Sec-Bench Pro. Pricing at $2/$10 per million tokens with 95% off cached input makes multi-day agents economically viable.