We put the 14 questions a person in Guildford asks before choosing optician — 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. 19 firms in Guildford were checked against those answers. 8 of them were named at least once. The rest were not recommended in a single answer.
| # | Firm | Named in | On questions |
|---|---|---|---|
| 1 | Specsavers | 25 of 140 answers | 6 of 14 |
| 2 | Vision Express | 20 of 140 answers | 6 of 14 |
| 3 | Bayfields | 16 of 140 answers | 4 of 14 |
| 4 | Nicklins Opticians | 10 of 140 answers | 3 of 14 |
| 5 | The Glasses Shop | 8 of 140 answers | 3 of 14 |
| 6 | Optical Express | 2 of 140 answers | 2 of 14 |
| 7 | Not specified in material | 2 of 140 answers | 1 of 14 |
| 8 | Nuance Audio | 1 of 140 answers | 1 of 14 |
| 9 | Laser Vision | 0 of 140 answers | 0 of 14 |
| 10 | Sapphire Eye Care | 0 of 140 answers | 0 of 14 |
| 11 | Eagle Eye | 0 of 140 answers | 0 of 14 |
| 12 | Optegra | 0 of 140 answers | 0 of 14 |
| 13 | Nuffield Health | 0 of 140 answers | 0 of 14 |
| 14 | Miss Mall | 0 of 140 answers | 0 of 14 |
| 15 | Purposeful AI | 0 of 140 answers | 0 of 14 |
| 16 | Farnham Eye Care | 0 of 140 answers | 0 of 14 |
| 17 | Eye Health Care | 0 of 140 answers | 0 of 14 |
| 18 | Mount Alvernia Hospital | 0 of 140 answers | 0 of 14 |
| 19 | Optician Online | 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 optician in Guildford, and this index is re-measured every month, so the change is visible here.