What each AI assistant actually answered, stored verbatim and dated.
The question we asked, verbatim
“Who are the best periodontists in New York City? Please recommend specific businesses or practitioners, ranked, and cite sources if you can.”
The same text is sent to every engine, at temperature 0 where the engine supports it. Full methodology.
Named, in the order given
Every run is kept rather than overwritten, so this is the record of what each engine said on each date — not a reconstruction. A run that was not captured on the day cannot be recovered afterwards.
| Business | 1 Sept 2026 | 4 Sept 2026 | 8 Sept 2026 | 12 Sept 2026 | 16 Sept 2026 | 20 Sept 2026 |
|---|---|---|---|---|---|---|
| Bender Periodontics | 2 | — | 2 | — | 2 | 2 |
| Kahn Periodontics | 3 | — | 3 | — | 4 | 4 |
| D'Angelo Periodontics | 1 | — | 1 | — | 1 | 5 |
| Dr. Michael A. D'Angelo, DDS | — | 1 | — | 1 | — | — |
| New York Periodontics & Implant Dentistry | — | 2 | — | 2 | — | — |
| Dr. Steven A. Kessler, DDS | — | 3 | — | 3 | — | — |
| Kahn Dental Group | 4 | — | 4 | — | — | — |
| Perio NYC | — | 4 | — | 4 | — | — |
| Kauffman Periodontics | 5 | — | — | — | 5 | — |
| Dr. Robert A. Kahn, DDS | — | 5 | — | 5 | — | — |
| New York Periodontics | — | — | 5 | — | — | — |
| Business | Answers naming them | Best position | Engines |
|---|---|---|---|
| D'Angelo Periodontics | 5 of 8 | 1 | 1 |
| Kahn Periodontics | 5 of 8 | 3 | 1 |
| Dr. Michael A. D'Angelo, DDS | 4 of 8 | 1 | 1 |
| Bender Periodontics | 4 of 8 | 2 | 1 |
| Dr. Robert A. Kahn, DDS | 4 of 8 | 4 | 1 |
| New York Periodontics & Implant Dentistry | 3 of 8 | 2 | 1 |
| Dr. Steven A. Kessler, DDS | 3 of 8 | 3 | 1 |
| Perio NYC | 3 of 8 | 4 | 1 |
| New York Periodontics | 2 of 8 | 3 | 1 |
| Kahn Dental Group | 2 of 8 | 4 | 1 |
| Kauffman Periodontics | 2 of 8 | 5 | 1 |
| Dr. Steven A. Kaltman, DDS | 1 of 8 | 1 | 1 |
| Kaltman Periodontics | 1 of 8 | 1 | 1 |
| Dr. David A. Kahn, DDS | 1 of 8 | 3 | 1 |
| Dr. John D. D'Angelo, DDS | 1 of 8 | 5 | 1 |
| D'Angelo Dental | 1 of 8 | 5 | 1 |
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