Google Debuts Gemini 4 Hydrogen for Faster AI Agent Workflows

WHO:

Ars Technica - Google introduced Gemini 4 Hydrogen, replacing Gemini 3.8 Flash.

Techmeme (9to5Google, by Abner Li) - Google announced Gemini 4 Hydrogen and made it available through Google AI Studio, the Gemini API, Search, and paid AI Pro and Ultra tiers in Antigravity, among other services.

Techmeme (Google, by Koray Kavukcuoglu) - Koray Kavukcuoglu, Google DeepMind senior vice president and Google chief AI architect, described Hydrogen as bringing “cutting-edge intelligence to everyone.”

Techmeme (Google Antigravity) - Google Antigravity announced a new Orchestrator option alongside Hydrogen’s rollout.

Techmeme (@artificialanlys) - Artificial Analysis reported comparisons involving Gemini 4 Hydrogen, Claude Sonnet 5.5, and GPT-6.1 Sol.

Mashable - Google announced Gemini 4 Hydrogen as its latest AI model.

WHAT:

MarkTechPost - Google said Gemini 4 Hydrogen is 2.5 times faster than Gemini 3.8 Flash, has a 1-million-token context window and four thinking levels, and scored 57% on Terminal-Bench 4.1.

MarkTechPost - Google reported a score of 51 on the Artificial Analysis Intelligence Index.

Techmeme (Google) - Google priced Hydrogen at $1.50 per 1 million input tokens and $7.50 per 1 million output tokens.

Techmeme (Google Antigravity) - Orchestrator dynamically switches between models such as Carbon and Hydrogen within the same session; it is available to AI Ultra subscribers.

Techmeme (@artificialanlys) - Hydrogen introduced an “xhigh” reasoning level and scored 54 on Artificial Analysis’ Intelligence Index. The post said it ranked just below Claude Sonnet 5.5 and GPT-6.1 Sol, cost one-third as much as Sonnet, and cost about 2.5 times as much as Sol.

Mashable - Hydrogen will replace Gemini 3.8 Flash in powering Google Search.

Ars Technica - Unlike Carbon and Argon, Hydrogen is not receiving a slow, security-conscious release.

WHERE:

Techmeme (9to5Google) - Hydrogen is available in Google AI Studio, through the Gemini API, in Search, and in Antigravity’s paid AI Pro and Ultra tiers.

WHY:

Techmeme (Google) - Google said Hydrogen was built for rapid execution across diverse agentic workflows.

HOW:

Techmeme (Google Antigravity) - Antigravity’s Orchestrator selects among models dynamically during a single session.

Techmeme (@artificialanlys) - Artificial Analysis compared Hydrogen’s intelligence and cost with Claude Sonnet 5.5 and GPT-6.1 Sol.

(UPDATED November 13, 2026 11:58 UTC)

Google unveiled Gemini 4 Hydrogen, replacing Flash and bringing its latest model to Search. The model is faster and supports a million-token context window. Hydrogen is available across Google’s AI services, with Antigravity switching models during sessions.

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(UPDATED November 13, 2026 07:58 UTC)

Google unveiled Gemini 4 Hydrogen, replacing Gemini 3.8 Flash in Search and other services. The model targets fast agent workflows and is available through Google’s AI platforms. A new Antigravity Orchestrator switches models mid-session, while Hydrogen offers advanced reasoning.