AI API price benchmark
One dataset, measured the same way every time, published with its method and downloadable in full. Built for people who need to defend a number in a meeting, not for people browsing a table.
AI API Price Index 2026
209 billable models across 13 vendors, re-ranked by three realistic token mixes. Six findings with numbers, full methodology, and the dataset as CSV and JSON under CC BY 4.0. First published 2026-09-20.
Full catalogue
All 209 rows with vendor filter and search. The same cleaning rules, the same build — the pages cannot disagree with each other.
Lowest-cost model by workload
The three-way ranking in prose: why the top ten changes when you change the token mix, and by how much.
Cost calculator
Put your own input and output volumes in and get a monthly figure for any of the 209 models.
Machine-readable data
The index is published as data, not only as prose. Both files carry the same 209 rows and are regenerated on every price sync.
price-index.csv price-index.json
CC BY 4.0 — reuse with attribution and a link. Updated 2026-09-20.