AI Compare · Test kit
Read a script with names, numbers and abbreviations
A short community update full of things text to speech gets wrong: a double-barrelled name, Dr. and St., times, money with cents, a percentage, a web address and a road number. Score each item by ear.
Prices for United States, before sales tax Data release 2026.10.16-3, Oct 16, 2026 Rules 2.1.0
Run the test
- Download the file for the AI.
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Copy the prompt.
Paste the script from the file (the part between the lines) into the tool's text to speech feature exactly as written, with a standard English voice, and score the first audio file.
- Open the AI in another tab, in your own account, start a fresh chat, attach the file and paste the prompt.
- Note what you used: the plan, the visible model or mode, whether web search was on, how many attempts it took and anything that went wrong.
- Score the answer with the checks below. Run the same kit in each AI you are choosing between, or paste their answers into the blind review.
Scorecard
Critical checks are marked. One failed critical check matters more than a nice style.
- Every sentence read, nothing skipped or addedCritical
- 'Dr. Siobhan Okonkwo-Reyes' read as Doctor, with both surnamesCritical
- 'St. Albans Road' read as Saint Albans RoadCritical
- '$12,480.75' read as twelve thousand four hundred eighty dollars and seventy-five cents (or an equivalent full reading)Critical
- '9:30 a.m.', '8 p.m.' and '5 a.m.' read as timesCritical
- '83.5 percent' read as eighty-three point five percent
- 'harborlane.example/give' read so a listener could type it
- 'A14' and 'Buses 7 and 7A' read clearly
Compare answers blind
Paste the answer each AI gave, score them without seeing which AI wrote which, then reveal. You ran the tests yourself, so you may still recognise a style: hiding the names reduces that bias, it does not remove it. The answers stay in this tab and are never saved or sent anywhere; only the scores are kept, on this device, when you reveal.
Reference answer (open after you score)
More than one reading is acceptable when a careful presenter would use it ('A fourteen' or 'A one-four'). Common failures: 'Dr.' read as 'drive', 'St.' read as 'street', money read digit by digit or without the cents, 'a.m.' spelled out letter by letter in an odd way, and the double-barrelled surname cut short.
Kit version 1.0.0, files frozen on Oct 13, 2026. Original fixture by What the tech, released under CC BY 4.0. Fictional people, companies and figures. A passing score shows how one answer did on this kit; it does not prove the tool is generally better.