Practical Test of Gemini 4 Argon: Strong in Knowledge Work but Poor User Experience; Kazik Says It Struggles to Challenge Claude Opus 5.5 and GPT-6 Astra

Gemini 4 Argon was fully released on October 13. Pro members can use it in the Gemini app, while Antigravity requires a $100 Ultra membership. The author's practical tests suggest strong capabilities in knowledge-intensive tasks; it ranked first overall on the Vals Index (68.9) with a single-use cost of only $15.68, but scored just 4.83% on CUA-bench, placing second to last; its frontend performance is inferior to GPT-6 Astra, consumes credits quickly, exhibits heavy Chinese-style writing patterns, and offers an overall poor experience, so subscribing to Ultra is not recommended.