Gemini 4 Pro / Flash: benchmarks, hands-on tests and leaks

Someone hooked Gemini 4 Argon into their company codebase and offered $1,000 to the first engineer who could guess what the PR does, as a real-world test.

A user had the Muse agent resolve a rental car claim across the rental, insurance and credit card companies over several days; it once tried to file on the wrong site, nearly exposing card details, and the user says Gemini 4 Argon's caution suits real work.

Several accounts with misspelled lab names are posting "Gemini 4 Argon / GPT 6.1 Astra early access" links that are not from Google or OpenAI, and users are warned not to sign in or click.

Argon's per-response limit rises to 1 million tokens, over 15 times the previous version, and Artificial Analysis puts it at $1.99 per task, below Opus 5.5 and GPT-6 Astra, though it is currently limited to select security teams.

Google says Argon agents scanned its data centers for memory use and freed over 300TB, and rewrote a video player in a safer language for a 2.7x speedup at the same picture quality.

Days after its announcement, Gemini 4 Argon is still limited to trusted cyber defenders while GPT-6 Bel rumors and Fable 5.5 leaks dominate, which the author reads as model hype cycles shrinking to days.

A user reports that a small UI change in Antigravity ran 9 minutes and used 50% of the weekly Opus 5.5 quota, and that Ultra users on Medium mode get only about 4 hours a week.

An Arabic post says Argon rewrote 32,000 lines of SIMD code in libgav1 for a 2.7x faster decoder, raised output to 1M tokens, and carries introductory pricing of $2/$10.

A Persian-language post complains that Google's student and JIO plans lack access to the new Sonnet and Opus 5.5, and that Gemini 4 Argon and Gemini 4 Flash are locked behind Ultra.

A user says they hope Gemini 4 Argon is strong enough that they never need to use ChatGPT or Claude again, an expectation rather than a hands-on test.

Antigravity added Claude Opus 5.5 and Sonnet 5.5, and the poster complains that Gemini 4 Argon still has not arrived.

A post claims Google released Gemini 4 Argon during the holiday, saying it beats GPT-6 Astra on several tests at 60% of the cost, and asks which model people now use as their main one.