Gemini 4 Hydrogen: Benchmarks & Security

Gemini 4 Hydrogen, released by Google on November 12, 2026, is positioned as a fast, multimodal reasoning model for everyday coding and agentic workflows, offering a roughly one-million-token context window and flat pricing of $1.50 per million input tokens and $7.50 per million output tokens. It substantially improves on Gemini 3.8 Flash in reported speed, coding-agent benchmarks, and reliability, though its token price is double Flash’s temporary introductory rate. Independent Artificial Analysis results rate Hydrogen at 51 on its Intelligence Index at the default high setting and 54 at xhigh, placing it near Claude Sonnet 5.5 at materially lower estimated task costs, although xhigh is slower and produces unusually large volumes of output. Google’s vendor-reported benchmarks show Hydrogen outperforming selected Claude and GPT competitors in seven of ten tests, while Claude Sonnet 5.5 remains stronger for terminal-based and desktop computer-use tasks. Google positions Hydrogen below Gemini 4 Carbon for difficult reasoning and as a complementary worker model alongside Carbon or Argon in multi-agent systems. Google also reports improved agent safety, including fewer misaligned actions and stronger resistance to indirect prompt injection than Flash, but the absence of absolute attack-success rates means organizations should independently test security, restrict tool permissions, log model settings, and apply external policy controls before production deployment.

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