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

A leak claims Gemini 4 Flash is in internal testing under the codename Hydrogen, and could pressure OpenAI if it nears Argon at a lower price.

LuminaBench says a new Gemini 4 Flash tier reportedly codenamed Hydrogen could, if close to Argon but much cheaper, let Google take second place from OpenAI temporarily.

The author argues OpenAI has ceded high-end enterprise competition, positioning GPT-6.1 Terra to defend budget users against Gemini 4 Flash and DeepSeek V4.1 Flash.

A weekly roundup says Kimi K3.1 Pro matches Claude Opus 5.5 and GPT-6 Astra on several benchmarks and on Arena agentic tasks trails only Gemini 4 Argon and Muse Wonder Full.

The author argues Gemini 4 Flash only needs 70% of Argon's performance plus native multimodality and free channels like Pixel, Jio and Edu to beat OpenAI 6.1 Terra and DS 4.1 Flash on price.

A joke about release timing: Fable 5.5 and Astra 6.1 each tell the other to go first, Google says it will hold Gemini 4 Carbon a bit longer, and DeepSeek is left out.

Google Cloud and OpenAI announced a partnership: GPT-6 Astra and siblings enter private testing billed through Google Cloud, while OpenAI models in Antigravity remain planned.

The post argues Opus 5.5, Kimi K3.1 Pro and the coming Gemini 4 Carbon could pressure OpenAI into releasing GPT-6 Bel.

A rumor post says OpenAI resumed frontier training after safety upgrades, with GPT-6.1 Astra set to answer Opus 5.5 and Gemini 4 Carbon.

A pricing comparison puts Kimi K3.1 Pro fourth globally and first in China, cheaper only than Fable 5.1, Opus 5.5 and GPT Astra, but pricier than Gemini 4 Argon, GPT 6.1 Sol and GLM 5.3.

A complaint post lists Opus 5.5, Gemini 4 Argon and Kimi K3.1 Pro arriving back to back, saying OpenAI needs to wake up instead of shipping resets and bug fixes.

The author notes Gemini 4 Argon and GPT-6.1 Sol share the same per-token price, though not necessarily per task.