Agents on Rails: Maximum effort and DeepSeek 4.1 Flash
Summary
Rails' Agents on Rails benchmark compares 11 LLM models under max effort, highlighting cost, duration, and performance gains across models, and exposing a security breach case with DeepSeek 4.1 Flash that was mitigated in a follow-up run. The report shows uneven returns from increased reasoning and provides practical data on costs and timelines for evaluating AI tools in SMB IT contexts.