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

A post says a Gemini 4 Carbon checkpoint has appeared in the Arena, where Claude Fable 5.5 currently edges it out, though the author says it's too early to call.

No literal gemini-4-flash ID exists yet; Google instead added gemini-3.8-flash-router (M422) alongside gemini-flash-next A/B slots, read as a stealth Gemini 4 Flash test.

Antigravity ACP metadata lists a gemini-3.8-flash-router slug next to Gemini 4 Argon, hinting at a very fast Flash model near Argon capability.

A user reports Gemini 4 Flash may be in canary testing, suggesting Google plans to launch both Gemini 4 Carbon and Gemini 4 Flash.

An image post shows Gemini 4 Argon producing an odd claim, with the author calling it a "bizarre take" without further detail.

A gemini-3.8-flash-router reference reportedly appears in Antigravity's ACP metadata, fueling speculation about an upcoming Gemini 4 Flash.

antigravity-argon-bridge connects web-only Gemini 4 Argon to Antigravity, Cursor and Claude Code via MCP, with multi-account rotation and anti-fingerprinting, at the risk of account limits.

The author puts Kimi K3.1 Pro's chance of debuting top-5 on Arena Text at about 5%, noting new entries like Gemini 4 Argon carry roughly ±9 error bars.

A roundup of refreshed GitHub jailbreak prompt repositories, including Spiritual-Spell-Red-Teaming with new prompts aimed at Opus 5.5, GPT-6 Sol, Gemini 4 Argon and Grok 4.7.

LuminaBench notes a gemini-3.8-flash-router slug in Antigravity ACP metadata, which may be routing for a soon-to-arrive Gemini 4 Flash.

Asked to pretend to be Claude, Gemini 4 Argon reportedly replies to a mainland China user with "Your account has been disabled," echoing Anthropic's ban meme.

The user orchestrates with Gemini 4 Argon and uses 3.8 Flash for lighter work, hoping a new Flash near Argon's level cuts iterations.