Explains the declared grain of a fact
Every fact row at one declared grain, chosen before the dimensions (Kimball's four-step design).
Can AI do this?
AI does this well Most of the tested AI models master this. 4 of 4 models in the current benchmark master it.
| Model | Tier | Probability of mastery | Status |
|---|---|---|---|
| gemini-4-argon | Flagship | 97% | Mastered |
| gemini-3.5-flash-lite | Low cost | 95% | Mastered |
| gpt-6-luna | Low cost | 96% | Mastered |
| claude-haiku-5-5 | Low cost | 97% | Mastered |
Mastered means a probability of at least 90% that the model has this knobit, estimated from its graded answers. “Not shown” means the answers do not settle it either way. How the models are tested.
What it looks like in practice
Expected result: Every fact row at one declared grain, chosen before the dimensions (Kimball's four-step design).
How it is assessed: Answers a written question on the fact grain correctly
Related knobits
Needed for
All 14 knobits of Design the bus matrix and data products.
Source: Practice the stage 3 reference and review checklist rest on