Gemini 4 Argon vs Opus 5.5: Which Is Better?
Your browser does not support the video tag. 0:00 Gemini 4 Argon vs Claude Opus 5.5: price and independent test results Argon vs Opus 5.5 in 30 Seconds Price: Argon’s $2 / $10 is a launch promotion. Google’s own footnote says the price moves to $4 / $20 once it ends, exactly what Opus 5.5 costs. The promo ends on 30 November 2026. Independent benchmarks: On the Artificial Analysis Intelligence Index, Opus 5.5 scores 58 and Argon 53. Cost per task is $1.99 for Argon at promo pricing versus $5.98 for Opus. Hallucinations: Argon’s hallucination rate is 15%, Opus 5.5’s is 59%. Argon says “I don’t know” far more often, while Opus knows more but also guesses when it shouldn’t. Coding: Opus leads Terminal-Bench 4.0 in both Google’s table and the independent run. Argon leads on workflow automation. Access: Both are available today. Argon opened on 13 October to Pro and Ultra subscribers in the Gemini app and the paid API tier. When Google announced Gemini 4 Argon on September 30, the headline number was simple: a frontier model at half the price of Claude Opus 5.5. A day later, two things are clearer. That price has an expiry date, and the first independent benchmark run puts the two models in a different order than Google’s own chart. ...