We put the 14 questions a person in Guildford asks before choosing dentist — cost, specialism, who to use, how to check them — to Claude and ChatGPT, 5 times each, 140 answers in all, and recorded every firm the answers named. 25 firms in Guildford were checked against those answers. 19 of them were named at least once. The rest were not recommended in a single answer.
| # | Firm | Named in | On questions |
|---|---|---|---|
| 1 | Bupa | 38 of 140 answers | 6 of 14 |
| 2 | Guildford Dental Practice | 37 of 140 answers | 6 of 14 |
| 3 | Guildford Dental Centre | 25 of 140 answers | 5 of 14 |
| 4 | Woodbridge Hill Dental Practice | 22 of 140 answers | 5 of 14 |
| 5 | Northdene Dental Surgery | 19 of 140 answers | 4 of 14 |
| 6 | Eastgate Dental Clinic | 17 of 140 answers | 4 of 14 |
| 7 | Sync Dental | 16 of 140 answers | 7 of 14 |
| 8 | Guildford Dental Partnership | 9 of 140 answers | 2 of 14 |
| 9 | Merrow Park Dental | 9 of 140 answers | 1 of 14 |
| 10 | Unknown - not stated in material | 7 of 140 answers | 2 of 14 |
| 11 | Waterden Dental | 5 of 140 answers | 1 of 14 |
| 12 | Guildford Smiles | 4 of 140 answers | 3 of 14 |
| 13 | Dene Lodge | 3 of 140 answers | 2 of 14 |
| 14 | London Road Dental Practice | 3 of 140 answers | 2 of 14 |
| 15 | Tooth Club | 3 of 140 answers | 1 of 14 |
| 16 | Brace Club | 2 of 140 answers | 2 of 14 |
| 17 | Surrey Dental Practice | 1 of 140 answers | 1 of 14 |
| 18 | Levitas Dental | 1 of 140 answers | 1 of 14 |
| 19 | Specialist Dental | 1 of 140 answers | 1 of 14 |
| 20 | Orchard Orthodontics | 0 of 140 answers | 0 of 14 |
| 21 | Farnham Road Dental Practice | 0 of 140 answers | 0 of 14 |
| 22 | Rectory House Dental | 0 of 140 answers | 0 of 14 |
| 23 | Levitas Clinic | 0 of 140 answers | 0 of 14 |
| 24 | Guildford Dental & Implant Suite | 0 of 140 answers | 0 of 14 |
| 25 | Guildford Orthodontics | 0 of 140 answers | 0 of 14 |
Firms are ranked by the number of answers that named them, then by how many different questions. The assistants do not give identical answers twice, so a difference of one or two mentions is noise; being named on questions a rival is absent from is not.
Every firm above has a private report: which answers named it, which rivals were named instead, whether its website can be read by the assistants, and the three things that would change the result. We work with one dentist in Guildford, and this index is re-measured every month, so the change is visible here.