AI Radar

Google brings Gemini 4 Hydrogen to AI Mode in Search

Google released Gemini 4 Hydrogen, now powering AI Mode in Search. Google says it handles multi-part questions, typos and highly specific requests. It is available in Search, the Gemini app and other Google products, and Simon Willison released llm-gemini 0.37 for it.

What to do
Upgrade to llm-gemini 0.37 and check the pricing table before choosing a Gemini 4 model.
Who should care
Developers using the Gemini API or the llm command-line tool.

Key facts

Gemini 4 Hydrogen is the lowest-cost member of the Gemini 4 family, per Willison
llm-gemini 0.37 released for the model
Willison calls the Gemini 4 pricing scheme confusing

Model

Gemini 4 Hydrogen Google

Input
$1.50
Output
$7.50
Context
1.04858M
Released
–

Prices in USD per 1M tokens.

BenchmarkScoreRank
LMArena Text1490.4 rating#13
LMArena WebDev1704.2 rating#9

Context

Willison says Hydrogen's price is not far from the larger Carbon and Argon models.

Timeline

Coverage

  1. llm-gemini 0.37simonwillison.net · Simonwillison

Evidence

High evidence: the claim comes from an official source (the company or project itself), or at least two independent sites reported it.

Details written Nov 13, 11:32 UTC from the sources listed above.