DeepSeek V4.1-Flash Moves Into Agent Arena's Open-Model Top Three

DeepSeek V4.1-Flash has entered Agent Arena's open-model top three, posting a +4.87% net improvement with a median cost of $0.07 per task and pushing a new cost-performance point onto the agent benchmark's Pareto frontier. The result gives developers another sign that open-weight models are narrowing the practical gap with proprietary systems in agent workflows, especially where cost per completed task matters as much as raw score.