GC AI ran a 12-hour internal hackathon to test Jev, TypeSafe's fast classification model that returns structured answers in 0.1-0.5 seconds at lower cost than standard LLMs. Teams built 38 projects, discovering that Jev excels at document analysis and classification tasks but struggles with temporal reasoning, and learning that fanning out concurrent API calls outperforms packing tabular data into prompts. A Chrome extension called ToS Trap Spotter demonstrated the model's practical value by scanning terms of service agreements in under 2 seconds with 89% accuracy.