Overview
Gemini 4 Hydrogen is the model Google announced on 12 November 2026, in a post by Koray Kavukcuoglu, SVP of Google DeepMind and Google's Chief AI Architect. Google describes it as a fast, efficient model for everyday coding and agentic workflows. It sits below the frontier models Gemini 4 Carbon and Gemini 4 Argon, which Google keeps for deep, long-horizon reasoning.
It has a 1M-token input context and can produce up to 1M output tokens. It supports four thinking levels: low, medium, high (the default) and a new xhigh. Google says that at its default setting it finishes tasks 2.5x faster than Gemini 3.8 Flash.
Google also says Hydrogen can work as the worker and verifier in multi-agent setups, with Carbon coordinating. It powers Google Search for all users worldwide from launch.
| Released | 2026-11-12 |
|---|---|
| License | Proprietary |
| Weights | API only |
| Parameters | Undisclosed |
| Modalities | Text, Vision, Audio, Video |
| Status | Available from 12 November 2026 in the Gemini API and Google AI Studio, Android Studio (paid tier), Google Antigravity, the Gemini app and Google Search. |
Benchmarks
- Terminal-Bench 4.157%
- HLE-Diamond58.8%
- Agents' Last Exam v1.171.6%
Scores on a 0–100 scale (25-point gridlines); higher is better. Each benchmark links to its published source.
Pricing
| Input | $1.50 / 1M tokens |
|---|---|
| Output | $7.50 / 1M tokens |
Flat across the full context window.
Strengths
- 51 on the Artificial Analysis Intelligence Index at high thinking (54 at xhigh), against 50 for Gemini 4 Argon
- 57% on Terminal-Bench 4.1, against 18.2% for Gemini 3.8 Flash
- 2.5x faster than Gemini 3.8 Flash at its default setting, per Google
- Flat $1.50 / $7.50 per 1M tokens across the full context window
Best for
- Reach for it for iterative coding, debugging and codebase Q&A in agent loops
- Reach for it as the worker or verifier agent when a larger model plans the work
- Reach for it for multimodal knowledge work over PDFs, spreadsheets, charts, audio and video
- For deep, long-horizon reasoning Google points to Gemini 4 Carbon and Gemini 4 Argon instead
Gemini 4 — every version
The full lineage of the Gemini 4 line, newest first. Every version has its own page — click any to compare specs, benchmarks and pricing.
| Version | Released | Context | License |
|---|---|---|---|
| Gemini 4 Hydrogencurrent | 2026-11-12 | — | Proprietary |
| Gemini 4 Carbon | 2026-10-28 | — | Proprietary |
| Gemini 4 Argon | 2026-09-30 | — | Proprietary |
FAQ
How much does Gemini 4 Hydrogen cost?
Gemini 4 Hydrogen costs $1.50 per million input tokens and $7.50 per million output tokens, according to Google. The price is flat across the full 1M-token context window.
Where can I use Gemini 4 Hydrogen?
Gemini 4 Hydrogen is available in the Gemini API and Google AI Studio, in Android Studio on the paid tier, in Google Antigravity for paid AI Pro and Ultra users, and in the Gemini app model menu. Google Search uses it for all users worldwide, and Gemini in Sheets is rolling out to paid plans first.
How does Gemini 4 Hydrogen compare with Gemini 4 Argon?
Google reports 51 for Gemini 4 Hydrogen on the Artificial Analysis Intelligence Index at high thinking, against 50 for Gemini 4 Argon, and 54 at xhigh. Google still positions Argon and Carbon as its frontier models for deep, long-horizon reasoning.