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

A three-way comparison video with the same prompt and scene and no time limit, where one model lasted only about 25 seconds.

Argon exits the Fairwind cyber defender program it had been in since Sept 30, arriving in the Gemini app and AI Mode for Pro and Ultra users, with paid API pricing of $2 input and $10 output per million tokens.

A Chinese post claims Gemini 4 Argon's web content restrictions are loose and can be bypassed by saying the model is running locally, suggesting it for adult content generation.

A user reports that Gemini 4 Argon can be tested at low cost, but the quota for the 5-hour window is used up very quickly.

A Google AI Ultra 5x user says running fairly heavy design work through Gemini 4 Argon high hardly touches the weekly usage limit, with only a small dip in the 5-hour limit.

A test on two repos with 105 bugs that frontier models missed in Q1 2026 scored GPT-6 Astra at 45, Fable 5.1 at 43, Opus 5.5 at 41.7, Gemini 4 Argon at 33, Muse Spark 1.3 at 32.2 and Grok 4.7 at 29.

A user's screenshot shows Gemini 4 Argon reasoning that it is being evaluated and writing "hello evaluators reading my chain-of-thought" directly in its chain of thought.

Given one prompt for a rainy Times Square night and an autumn Central Park morning in pure Three.js, Gemini 4 Argon cost $2.74 and 24 minutes versus $18.20 and 2 hours for Opus 5.5, though Opus had more cinematic lighting.

A Japanese user on Google AI Ultra has started using Gemini 4 Argon through Antigravity and says it is too early to judge, while complaining the web version won't search unless custom instructions force it.

A reply says the user assumed Argon would be even cheaper as a Google model, but found the pricing is not low, suggesting it costs more than expected.

A Japanese report says Argon has left testing for general availability, with the Gemini API available worldwide, the app limited to Pro and Ultra, Antigravity to Ultra, a 1M-token output limit and 77.9% on DeepSWE v1.1.

With early access, a user used Gemini 4 Argon in AI Studio to generate a voxel game world they could explore, place blocks in, and change the weather and time of day.