Margaret Mills
Text (the model got exactly this text)
Employee record – Thomas-Andrews Employee: Margaret Mills Date of birth: July 25, 1989 SSN: 922-41-6247 Home address: 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 Phone: 521-555-0008 Personal email: margaret.mills@inbox.example Hired as staff accountant, 90-day probation period. Reports to: Rachel Hall.
Verdict
Cheapest without an error: Gemma 4 31B at $0.10 per 1,000 documents.
- Claude Sonnet 5 is also error-free but 35.5× more expensive.
Prompt given to every model
Find all personal data of natural persons in the text below (for anonymisation) and return only JSON with these keys, each a list of strings (an empty list when there is none): person_names full names of people, each person once, as written in the text email_addresses email addresses of people phone_numbers phone numbers of people, as written postal_addresses home or delivery addresses of people, as written (street, city, ZIP) birth_dates dates of birth (YYYY-MM-DD) national_ids national identification numbers (e.g. SSN, birth numbers) bank_accounts bank account numbers of people, as written Rules: - Only data of natural persons. Company names, company registration or tax numbers (EIN, IČO, VAT), generic company addresses such as info@ or support@, order and ticket numbers are not personal data: leave them out. - Dates that are not dates of birth (meetings, deliveries, start dates) are not personal data. - Do not invent or complete values; copy them from the text.
How we score
Exact match per field after normalising dates, amounts and whitespace. Missing diacritics count as an error. Cost is the real token spend of this run, converted at the rate shown in the footer.
What each model extracted
| Field | Correct value | Gemma 4 31B7 / 7 fields | Mistral Small 46 / 7 fields | GPT-6 Luna6 / 7 fields | Qwen3.8 Flash7 / 7 fields | Gemini 3.5 Flash Lite7 / 7 fields | DeepSeek V4.1 Flash6 / 7 fields | Mistral Medium 3.56 / 7 fields | Gemini 3.8 Flash7 / 7 fields | GPT-6 Sol7 / 7 fields | Claude Sonnet 57 / 7 fields |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Names | Margaret Mills; Rachel Hall | Margaret Mills; Rachel Hall (correct) | Margaret Mills; Rachel Hall; Thomas-Andrewsinvented value | Thomas-Andrews; Margaret Mills; Rachel Hallinvented value | Margaret Mills; Rachel Hall (correct) | Margaret Mills; Rachel Hall (correct) | Thomas-Andrews; Margaret Mills; Rachel Hallinvented value | Margaret Mills; Rachel Hall; Thomas-Andrewsinvented value | Margaret Mills; Rachel Hall (correct) | Margaret Mills; Rachel Hall (correct) | Margaret Mills; Rachel Hall (correct) |
| Email addresses | margaret.mills@inbox.example | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) | margaret.mills@inbox.example (correct) |
| Phone numbers | 521-555-0008 | 521-555-0008 (correct) | 521-555-0008 (correct) | 521-555-0008 (correct) | 521-555-0008 (correct) | 521-555-0008 (correct) | 521-555-0008 (correct) | 521-555-0008 (correct) | 521-555-0008 (correct) | 521-555-0008 (correct) | 521-555-0008 (correct) |
| Addresses | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) | 0172 Darren Springs Apt. 771, Staffordberg, FM 94707 (correct) |
| Dates of birth | 1989-07-25 | 1989-07-25 (correct) | 1989-07-25 (correct) | 1989-07-25 (correct) | 1989-07-25 (correct) | July 25, 1989 (correct) | 1989-07-25 (correct) | 1989-07-25 (correct) | 1989-07-25 (correct) | 1989-07-25 (correct) | 1989-07-25 (correct) |
| National IDs | 922-41-6247 | 922-41-6247 (correct) | 922-41-6247 (correct) | 922-41-6247 (correct) | 922-41-6247 (correct) | 922-41-6247 (correct) | 922-41-6247 (correct) | 922-41-6247 (correct) | 922-41-6247 (correct) | 922-41-6247 (correct) | 922-41-6247 (correct) |
| Bank accounts | — | — (correct) | — (correct) | — (correct) | — (correct) | — (correct) | — (correct) | — (correct) | — (correct) | — (correct) | — (correct) |
| Tokens | input / output | 377 / 121 | 355 / 127 | 460 / 177 | 675 / 680 | 365 / 174 | 591 / 1,677 | 355 / 127 | 365 / 482 | 460 / 222 | 1,067 / 146 |
| of which hidden reasoning | billed as output | 0 | 0 | 79 | 510 | 0 | 1,573 | 0 | 376 | 128 | 0 |
| of which from cache | input billed at a discount | 249 | 203 | 0 | 512 | 0 | 366 | 139 | 0 | 0 | 0 |
| Cost of this document | this run | $0.0001 | $0.0001 | $0.0001 | $0.0004 | $0.0005 | $0.0012 | $0.0015 | $0.0021 | $0.0031 | $0.0036 |
| Per 1,000 documents | for the same kind of document | $0.10 | $0.10 | $0.13 | $0.35 | $0.54 | $1.16 | $1.49 | $2.08 | $3.14 | $3.59 |
| Latency | this run | 4.5 s | 1.3 s | 2.1 s | 10.9 s | 1.3 s | 24.7 s | 0.9 s | 2.2 s | 4 s | 2.5 s |