Explains blocking in record linkage
Reducing comparisons by blocking keys, with several passes so a changed field cannot keep true matches apart.
Can AI do this?
AI does this well Most of the tested AI models master this. 3 of 4 models in the current benchmark master it.
| Model | Tier | Probability of mastery | Status |
|---|---|---|---|
| gemini-4-argon | Flagship | 96% | Mastered |
| gemini-3.5-flash-lite | Low cost | 92% | Not shown |
| gpt-6-luna | Low cost | 97% | 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: Reducing comparisons by blocking keys, with several passes so a changed field cannot keep true matches apart.
How it is assessed: Answers a written question on the blocking correctly
Related knobits
Needed for
All 16 knobits of Define the matching rules.
Source: Practice the stage 3 reference and review checklist rest on