DeepSeek-V4.1-Flash (Max) Moves Onto Agent Arena’s Cost-Performance Frontier

DeepSeek-V4.1-Flash (Max) has emerged as one of the most cost-efficient open models in Agent Arena, posting a reported +4.87% net improvement at a median task cost of $0.07. The result puts the model on the benchmark’s Pareto frontier, where stronger agent performance is weighed against the cost of completing tasks.