Arena ranks Gemini 4 Hydrogen #5 in Agent Arena, #4 on knowledge work

Arena says that, based on more than 6,000 real-world agentic sessions, Gemini 4 Hydrogen (High) is #5 in Agent Arena overall and moves up to #4 on knowledge-work tasks.

• On knowledge work, Arena says Hydrogen is ahead of three models that outrank it overall, among them Claude Opus 5.5 (Max).