# Gemini 4 Hydrogen

Gemini 4 Hydrogen is Google's latest language model in our dataset, released Nov 12, 2026. Proprietary, API access only. Google's fast Gemini 4 model for everyday coding and agentic workflows, released Nov 12, 2026 across the Gemini API, AI Studio, Gemini for business, the Gemini app and Search. Verified against vendor sources on Nov 12, 2026.

Primary source (source of record; Agentic Weekly is the fast independent index): https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/

Last verified: 2026-11-12 · Evidence: Reported · Canonical: https://theagenticweekly.com/models/gemini-4-hydrogen · JSON: https://theagenticweekly.com/api/models/gemini-4-hydrogen

## Key facts

| Fact | Value | Source | Label | Anchor |
|---|---|---|---|---|
| Vendor | Google |  | editorial | https://theagenticweekly.com/models/gemini-4-hydrogen#fact-vendor |
| Released | Nov 12, 2026 | https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/ | vendor-reported, confirmed | https://theagenticweekly.com/models/gemini-4-hydrogen#fact-release-date |
| API id | `gemini-4-hydrogen` | https://ai.google.dev/gemini-api/docs/models/gemini-4-hydrogen | vendor-reported, confirmed | https://theagenticweekly.com/models/gemini-4-hydrogen#fact-api-id |
| Context window | 1,048,576 tokens (1.05M) | https://ai.google.dev/gemini-api/docs/models/gemini-4-hydrogen | vendor-reported, confirmed | https://theagenticweekly.com/models/gemini-4-hydrogen#fact-context-tokens |
| Max output | 65,536 tokens. Default synchronous limit; up to 1,048,576 with long decode. | https://ai.google.dev/gemini-api/docs/models/gemini-4-hydrogen | vendor-reported, confirmed | https://theagenticweekly.com/models/gemini-4-hydrogen#fact-max-output-tokens |
| Input | text, image, video, audio, pdf | https://ai.google.dev/gemini-api/docs/models/gemini-4-hydrogen | vendor-reported, confirmed | https://theagenticweekly.com/models/gemini-4-hydrogen#fact-input-modalities |
| Licence | Proprietary (API) | https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/ | vendor-reported, confirmed | https://theagenticweekly.com/models/gemini-4-hydrogen#fact-license |
| Pricing | $1.5 in / $7.5 out per 1M tokens. Flat across the full 1M-token context, per the launch post. | https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/ | vendor-reported, confirmed | https://theagenticweekly.com/models/gemini-4-hydrogen#fact-pricing |

## Vendor claims and neutral signals

- Vendor claim (Google): 51 on the Artificial Analysis Intelligence Index at default high thinking, 54 at xhigh. We did not verify this.
- Vendor claim (Google): 57% on Terminal-Bench 4.1 vs 18.2% for Gemini 3.8 Flash. We did not verify this.

## What we tested

Nothing yet. We have not run Gemini 4 Hydrogen ourselves, so every fact here is Reported from the sources below.

## Not verified, left out

- Cached-input and batch pricing: not stated in the launch post; the API page says explicit caching is not supported.

## Alternatives to Gemini 4 Hydrogen

Models from other vendors that share at least one of our groups, from each model's sourced facts (not tested by us).

- [MiniMax M3.1 Flash](https://theagenticweekly.com/models/minimax-m3-1-flash) (MiniMax): Both in: Agents, Coding, Small and fast · $0.15 in / $0.6 out per 1M tokens · 1M context · released Oct 19, 2026
- [Claude Fable 5.2](https://theagenticweekly.com/models/claude-fable-5-2) (Anthropic): Both in: Coding, Agents · $8 in / $40 out per 1M tokens · 1M context · released Nov 9, 2026
- [Muse Ember](https://theagenticweekly.com/models/muse-ember) (Meta): Both in: Small and fast, Agents · $0.1 in / $0.5 out per 1M tokens · 1.05M context · released Nov 9, 2026
- [Inkling 2 Small](https://theagenticweekly.com/models/inkling-2-small) (Thinking Machines Lab): Both in: Agents, Coding · released Nov 5, 2026
- [LongCat-2.5](https://theagenticweekly.com/models/longcat-2-5) (LongCat, Meituan): Both in: Agents, Coding · $0.3 in / $1.2 out per 1M tokens (launch promo, Listed as a limited-time discount with no end date or regular price given.; list price after the promo not stated) · 1M context · released Nov 2, 2026
- [GPT-6.1 Terra](https://theagenticweekly.com/models/gpt-6-1-terra) (OpenAI): Both in: Agents, Small and fast · $1 in / $5 out per 1M tokens · 1.05M context · released Oct 26, 2026
- [Best AI model for agents (Nov 2026): Claude Opus 5.5 leads Terminal-Bench 4.0](https://theagenticweekly.com/best/ai-model-for-agents)
- [Longest context window LLMs](https://theagenticweekly.com/best/long-context-llms)

## Gemini 4 Hydrogen FAQ

**When was Gemini 4 Hydrogen released?**

Google released Gemini 4 Hydrogen on Nov 12, 2026. Source: https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/

**How much does Gemini 4 Hydrogen cost?**

The listed API price is $1.5 in / $7.5 out per 1M tokens. Prices change; the source shows the current figure. Source: https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/

**How large is the Gemini 4 Hydrogen context window?**

1,048,576 tokens, with up to 65,536 output tokens. Source: https://ai.google.dev/gemini-api/docs/models/gemini-4-hydrogen

**Is Gemini 4 Hydrogen open weights?**

No. The weights are not published; the licence is listed as Proprietary (API). Source: https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/

**What is the API model id for Gemini 4 Hydrogen?**

gemini-4-hydrogen. Source: https://ai.google.dev/gemini-api/docs/models/gemini-4-hydrogen

**Has Agentic Weekly tested Gemini 4 Hydrogen?**

Not yet. Every fact on this page is Reported: read from the linked vendor pages, not measured by us.

## Sources

- [Google launch post (Nov 12, 2026)](https://blog.google/innovation-and-ai/models-and-research/gemini-models/introducing-gemini-4-hydrogen/)
- [Gemini API model page](https://ai.google.dev/gemini-api/docs/models/gemini-4-hydrogen)
- [Agentic Weekly brief](https://theagenticweekly.com/news/google-gemini-4-hydrogen)

Data licence: CC BY 4.0. Data: Agentic Weekly (https://theagenticweekly.com), CC BY 4.0.