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

A leak says Gemini 4 Argon has not launched yet while Google has already begun testing the next-generation Gemini 4 Carbon internally, with the post joking about far-off release dates.

Reporter Hugh Langley says Google employees are testing a Gemini 4 model codenamed Carbon, which appears stronger than Argon, with some comparing its coding to Opus 5.5, though he notes these are mostly impressions for now.

A post links to a Business Insider report that Google employees are testing a new Gemini 4 checkpoint called Carbon; the article is paywalled.

Business Insider reports that Google is preparing to release Gemini 4 Argon publicly while staff test a newer model codenamed Carbon on its internal Jetski coding platform, said to rival Opus.

A user says Argon beats Claude and ChatGPT on its own benchmarks but independent rankings still put Opus 5.5 first, and worries the hype will backfire if the release falls short.

A satirical post claims the community, and even DeepMind employees, have hallucinated the existence of Gemini 4 Argon, calling it a Mandela effect and the first public case of mass AI psychosis.

According to Business Insider, Google employees are already testing a new Gemini 4 checkpoint codenamed Carbon in Jetski, with one employee saying it feels like Opus 5.5 for coding, even before Argon has shipped.

A user noticed Google has added new reasoning modes to Gemini models, speculating it may be preparation for Gemini 4 Argon's public release, possibly with region-based access.

A leak says Google employees are already testing another Gemini 4 model codenamed Carbon internally, with coding compared to Claude Opus 5.5, before Argon gets a broader public rollout.

A post cautions that people excited about Argon forget Logan once said the same things about Gemini 3.5 Pro.

Andrew Curran links a Business Insider report saying Google employees are internally testing Gemini 4 versions including Argon, Barium and Carbon.

A complaint post says Google keeps making moves but still hasn't released Gemini 4 Argon, reflecting community frustration with the release pace.