Gemini 4 Hydrogen

A fast, cheaper Gemini 4 model for everyday coding and agent loops, with flat pricing across the full 1M context. It has a 1M tokens context window. Through Google’s API it costs $1.50 per million input tokens and $7.50 per million output tokens.

Among the tools we track, it’s available in Antigravity CLI, Copilot, Cursor and Amp. It launched alongside Antigravity’s Orchestrator, which switches between Carbon and Hydrogen within a session, and is available on every Antigravity tier.

What Google reports

• Google reports 57% on Terminal-Bench 4.1

Vendor-reported figures, not independently verified by Code×Radar.

Related changes

• Antigravity CLI 1.5.8 adds Gemini 4 Hydrogen and Carbon, with two security fixes · November 13, 2026
• Copilot will drop six models, including Claude Fable 5, on December 14 · November 13, 2026

Sources

• aistudio.google.com: gemini 4 hydrogen
• aistudio.google.com: pricing
• blog.google: introducing gemini 4 hydrogen
• cursor.com: models

Facts last checked November 15, 2026.