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

A user claims Gemini 4 Argon already matches GPT-6 Astra on AA benchmarks, with a stronger Carbon and a Hydrogen-codenamed Flash coming.

Rumors say Gemini 4 Flash is testing internally as Hydrogen, with a gemini-3.8-flash-router model ID and speculation of a launch this week or next.

Rumors around Gemini 4 Flash grow, with early Carbon testers saying its 3D output beats Argon but runs slower; the author guesses Flash pricing at $0.50–0.75 input and $2–4 output per million tokens.

Ad-supported client freebuff gives free access to several models, including one daily Gemini 4 Argon session, with rate limits.

A user predicts Google will surpass OpenAI by year end with Gemini 4 Argon, migrating all GPT-6.1 Sol, Terra and Sonnet 5.5 workloads, and says the upcoming Gemini 4 Carbon will beat Opus 5.5.

The post says every lab is shipping a cheaper flagship, and Google's rumored Hydrogen could win this round if it nears Argon without burning extra tokens.

A user plans to stay up until 1 a.m. for the Gemini 4 Flash (codename Hydrogen) release and asks others what they want benchmarked.

One prompt across Gemini 4 Argon, Claude Opus 5.5, GPT-6 Astra and Grok 4.7 to see which renders water flow and lever motion that obey physics.

The author argues the next Flash won't be called 4 Flash, that gemini-4-flash-preview was added in June and deleted in August, and gemini-3.8-flash remains the active version.

A short leak mentions gemini 4 carbon and gemini 4 Flash, with no specs, timing, or sourcing.

A Spanish-language video argues Gemini 4 lets non-specialist designers build 3D websites, undercutting agencies that charge around $50K.

A leak claims Gemini 4 Pro is codenamed Argon, Ultra Carbon and Flash Hydrogen, with the whole generation named after elements.