Gemini 4 Hydrogen (High) by @GoogleDeepMind debuts #5 on Agent Arena with +14.8% net improvement across 6.5k real-world agentic sessions.
Hydrogen stands out for its speed and cost efficiency:
- Fastest model in the top 10: 5.3 min/task (median), 3x faster than #1 Claude Fable 5.2 and 2.4x faster than GPT-6 Astra
- Cost-efficient: $1.6 cost/task (median), 3.7x cheaper than GPT-6 Astra and 4.7x cheaper than Claude Fable 5.1. API token pricing: $1.5/$7.5 input/output per million tokens
Notably, it spends more output tokens per task: 41% more than Carbon, 2.8x more than Argon.
Strong across key signals:
- #2 Steerability: +21% (behind only Fable 5.2 at +33%; ahead of Carbon at +19% and Opus 5.5 at +18%)
- #4 Praise vs. Complaint: +32%
- #5 Confirmed Success: +15%
Ranking by task category:
- #3 in Chat: +19%
- #7 in Work: +13%
- #9 in Code: +12%
Hydrogen delivers competitive performance while completing tasks significantly faster and at a fraction of the cost of several leading models. Congrats to the @GoogleDeepMind team on another impressive release!