Google Tests Internal Hydrogen, a Fast Gemini 4 Flash

Google is circulating internally Hydrogène, a Gemini 4 Flash model described as fast and efficient. While Carbon, its latest frontier model, is being deployed but reserved for paying customers, the pricing status of Hydrogène remains undetermined. Employees access it via the internal platform Jetski, which often precedes a public launch. Anthropic, on its side, has unveiled new models Fable and Mythos.

Carbon and Argon Reserved for Paying Customers, Hydrogène Without Public Status

The Gemini 4 Carbon and Argon models are currently accessible only to paying users. It is not established whether Hydrogène, if offered to the public, will be free or paid. Google has declined to comment officially.

Hydrogène Evaluated on Jetski and Presented as Fast and Efficient

Google has internally tested a Gemini 4 Flash model called Hydrogène. This model is described internally as designed for speed and efficiency, with an engineer presenting it this week as very capable, fast, and efficient. Employees have been able to use it through Jetski, the internal development tool that is frequently used to test products before their official release. According to an employee who experienced Hydrogène, it bears similarities to the older Flash models, which are considered faster and less costly work models than those like Argon. Additionally, the Gemini application offers other Flash models for free.

Gemini 4 Carbon Deployed and Competition from Anthropic Strengthened

On Tuesday, Google announced the deployment of Gemini 4 Carbon, presented by the company as the most powerful for cybersecurity and long tasks requiring multiple steps. This launch comes after the delay and subsequent cancellation of Gemini 3.5 Pro earlier this year, an episode after which many believed Google had fallen behind in the race for frontier AI models, prior to the launch of the Gemini 4 family. On Monday, Anthropic announced new models in its Fable and Mythos lines, which the company claims are better suited to detect cybersecurity vulnerabilities and design physical hardware. Google also describes Carbon as its most powerful model to date.