Agent Arena: Gemini 4 Hydrogen is fastest and cheapest, ranks 4th in knowledge work

LMArena's Agent Arena, based on 6,000+ real agentic sessions, ranks Gemini 4 Hydrogen fifth overall with a +14.8% net gain — fastest at 7.3s per step (2.7x Claude Sonnet 5.5) and cheapest, rising to 4th in knowledge work.

2026-11-13 ~ 2026-11-13 · 3 related posts

• Gemini 4 Hydrogen debuts #5 on Agent Arena: 3x faster and 4.7x cheaper than rivals — arena · 2026-11-13
• Agent Arena: Gemini 4 Hydrogen steps take 7.3s, 2.7x faster than Sonnet 5.5 at par quality — arena · 2026-11-13
• Gemini 4 Hydrogen Rises to #4 in Knowledge Work on Agent Arena, Beating Three Higher-Ranked Rivals — arena · 2026-11-13