Alphabet gains on Gemini 4, AI glasses

Alphabet’s stock gained 1.19% after Google launched its new Gemini 4 Hydrogen AI model and opened preorders for Gemini-powered smart glasses. The twin announcements highlight both software and hardware advances in Google’s AI strategy, with Hydrogen set to underpin AI Mode in Search and the smart glasses bringing Gemini capabilities to wearable devices.

The market move came as Google broadened access to advanced AI features and introduced a new, lower-cost model tier intended for widespread use by developers, enterprises and consumers. Together, the updates expand both the performance and reach of Google’s Gemini ecosystem.

Gemini 4 Hydrogen is a speed-focused, low-cost model that replaces the Flash-branded models and becomes the default engine for AI Mode in Search. It is available immediately to developers, enterprises and consumers across the Gemini API, AI Studio, the Gemini app, Google Search and the Antigravity development platform.

The model runs at four reasoning levels, including a new xhigh tier, and completes tasks 2.5 times faster than Gemini 3.8 Flash. It cuts fabricated claims by more than five times compared with 3.8 Flash and more than triples its score on the Terminal-Bench 4.1 coding benchmark, rising to 57%.

Hydrogen scores 54 on the Artificial Analysis Intelligence Index at xhigh reasoning and is compared with Anthropic’s Claude Sonnet 5.5 and OpenAI’s GPT-6.1 Terra in Google’s evaluations.

For developers, Hydrogen is priced at $1.50 per million input tokens and $7.50 per million output tokens, with a one-million-token context window for both input and output. A cached input rate of $0.075 per million tokens is also offered. The model generates output at roughly 200 tokens per second and raises the output ceiling to one million tokens, with 64,000 tokens available on a default synchronous call.

Hydrogen can be used to write code, run tests, validate changes and handle daily tasks independently, or in multi-model workflows with Carbon and Argon. It is also integrated into Google Search as part of what the company describes as the biggest update to its AI-powered search tools, aiming to better handle long, multipart questions and enhance AI Overviews and AI Mode.

Access in the Gemini app and AI Studio is tiered: the model is live for AI Pro and Ultra subscribers, while AI Plus and free users continue on older models such as 3.5 Flash-Lite. Across Google’s products, Hydrogen has replaced Gemini 3.8 Flash as the primary fast, economical option.

Google highlights safety and reliability improvements for a model marketed for autonomous execution. Compared with 3.8 Flash, Hydrogen reduces overreach in agentic tasks by as much as 81% and under-service by as much as 79%, while misaligned behavior and shortcut-taking in tool use and code evaluation fall twelvefold. It achieves a 96.7% honesty rate in an internal agent honesty evaluation and maintains 99.9% chain-of-thought readability across more than 200,000 audited conversations.

At the same time, unjustified refusals rise by 5.57 percentage points, mainly on multimodal prompts, and refusal tone scores decline slightly, even as image-to-text and multilingual safety metrics improve. An Orchestrator feature in the Antigravity platform routes work between Carbon and Hydrogen, reducing quota use by 24% in tests.

Enterprise and partner trials report speed gains of two to 2.8 times on complex graph computation, SQL and data-intensive workloads, while cutting token use by 12% to 23%. In biotechnology testing, Hydrogen passed 67% of a toxicology and safety benchmark section, compared with 37% for non-Gemini models.

Alongside the software release, Google began taking preorders for Gemini-powered smart glasses built with Samsung and eyewear brands Warby Parker and Gentle Monster. Warby Parker frames start at $395, while Gentle Monster styles are priced from $449.

The glasses ship on December 10 in the US and South Korea and work with iPhone 13 Pro and later models, as well as Pixel 7 and newer and Samsung Galaxy S or Z devices running One UI 9 or later. The devices are part of a broader hardware push to bring Gemini capabilities into everyday wearables and complement the expanded AI services powered by Hydrogen.