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

A Japanese user says Gemini 4 Argon is now available, Google's first non-Flash strong model in a while, comparable to Astra and Fable, and mentions 1M token output, Blender 3D scenes, and API pricing at half price until November 30, 2026.

A roundup of Argon-related PRs and support progress across vLLM, Google ADK, antigravity-auth, Gemini CLI and other repositories.

A Chinese user says Argon's plain-language ability is close to Opus 5.5 and its instruction following beats GPT-6.1 Sol and Astra, with looser guardrails, and may become their main model.

A comparison chart shows Argon at 19.6% on Harvey's Legal Agent versus 3.8% for Opus 5.5 and 84.2% on 1M-context GraphWalks, while Opus 5.5 still leads on Terminal-bench 4.0.

First impressions say Argon is very fast and priced like GPT-6.1 Sol until prices double in December, but cache control is limited, it fits poorly with existing API tasks, and coding still favors Opus 5.5.

The author ran three simple Minecraft browser tests with Gemini 4 Argon; results were mediocre, but the tests used up the entire $100 weekly quota in 30 minutes.

Peter Yang compared Gemini 4, Muse Wonder, GPT-6 Astra and Opus 5.5 on 3D modeling, games, animated shorts, website design and other tasks, saying Opus still wins on 3D but Gemini 4 surprised him.

A third-party gateway ran the same prompt through both models to generate Japanese night-scene pixel art: Argon took 3 minutes and $0.5, while GPT-6 Astra took 25 minutes and $11.

After Google opened access to Argon, a demo showed it watching a human play cornhole, practicing in MuJoCo and learning from mistakes to land 7 shots in a row on a real robot.

Pollo AI says Gemini 4 Argon is now available on its platform and can be tried through Pollo Agent.

An Arabic post says Gemini 4 Argon is now available in Google Antigravity on desktop and CLI for Google AI Ultra subscribers, and that it is already used widely inside Alphabet.

A post with a screenshot says Gemini 4 Argon is now available on the Gemini App for Pro plan users.