Gemini 4 Carbon
Knows up to March 2026Missing 1,889 events
gemini-4-carbon
$2 in, $10 out per 1M tokens
Gemini 4 Hydrogen
Launched 2026-11-12. Model id gemini-4-hydrogen as shown in Google’s AI Studio link.
Model idgemini-4-hydrogen
Price$1.50 in, $7.50 out per 1M tokens
Checked12 November 2026
Knows up to March 2026
1,889events after its cutoff
85 historic, 433 major. 227 days of news.
It launched on 12 November 2026, already missing 1,863 of them.
How to call it
2 ways to use Gemini 4 Hydrogen, with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Gemini API (Google AI Studio, all tiers) | gemini-4-hydrogen |
https://generativelanguage.googleapis.com/v1beta/models/gemini-4-hydrogen:generateContent |
ai.google.dev |
| Gemini app (model picker; free users via auto selection), Google Search (all users), Antigravity (AI Pro and Ultra), Gemini in Sheets, Android Studio, Gemini for business | gemini.google.com |
Pricing
| Input | $1.50 per 1M tokens |
|---|---|
| Output | $7.50 per 1M tokens |
As published: “per 1M tokens, flat across the full 1M context (Google); cached input 95% off (Artificial Analysis)”.
Source: blog.google, checked 12 November 2026.
Specs
- Input
- Text, images, audio, video and PDF
- Output
- Text
- Context window
- 1,000,000 tokens
- Max output
- 1,000,000 tokens
- Open weights
- No
- Licence
- Proprietary
- Training cutoff
- March 2026
- Released
- 12 November 2026
- Status
- Current
- Type
- Reasoning model
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Fast tier that matches the previous frontier model
Artificial Analysis Intelligence Index 51 at high, 54 at xhigh (#16 of 78), vs 50 for Gemini 4 Argon; ~198 output tokens/s; $3.16 per index task, but very verbose (304M output tokens on the index, #76 of 77).
Agentic coding at Flash speed
Vendor-reported Terminal-Bench 4.1 57% vs 18.2% for Gemini 3.8 Flash; about 2.5x faster than 3.8 Flash at the default high setting; new xhigh thinking level.
Four assistants, one scale
Each row runs from what the model knows (graphite) through the months between its cutoff and its launch (hatched) to today (pink).
- GPT-6 Astra 271 at launch, 1,863 today
- Claude Opus 5.5 372 at launch, 1,795 today
- Gemini 4 Hydrogen 1,863 at launch, 1,889 today
- Grok 4.7 387 at launch, 1,829 today
Show as a table
| Model | Cutoff | Released | Missing at launch | Missing today |
|---|---|---|---|---|
| GPT-6 Astra | April 2026 | 3 September 2026 | 271 | 1,863 |
| Claude Opus 5.5 | June 2026 | 22 September 2026 | 372 | 1,795 |
| Gemini 4 Hydrogen | March 2026 | 12 November 2026 | 1,863 | 1,889 |
| Grok 4.7 | May 2026 | 21 September 2026 | 387 | 1,829 |
Notes
Google’s fast Gemini 4 model, positioned below Carbon and Argon and replacing Gemini 3.8 Flash as the everyday default. Thinking levels low/medium/high (default)/xhigh. Inputs per Google: text, PDFs, spreadsheets, charts, audio and recorded video; output text. Knowledge cutoff March 2026 per the DeepMind model card; our no-search probe on 2026-11-12 agreed (correct details for six Jan–Mar 2026 events, ‘don’’t know’ for five April–June 2026 events, names March 2026 as its last reliable month). Vertex AI availability not stated in the launch post. Vendor safety numbers: 96.7% on an internal agent-honesty eval, 2.3x more resilient to indirect prompt injection on Gray Swan IPI. Antigravity’s new Orchestrator switches between Carbon and Hydrogen within a session (Ultra).