Every AI model is a different mind. One over-explains, one hedges, one truncates, one invents. The differences are invisible when you only ever talk to one of them — and expensive when you bet a workflow on the wrong one.
The industry answer is benchmarks. But benchmarks measure someone else's tasks. The only benchmark that matters is your prompt, on your task, today.
That's what the Lab is for. Run the same prompt through two models side by side and the differences stop being opinions — they become visible facts. Try the seeded experiment: a trivially simple constraint task. Watch which model actually follows the constraint.