Using the data

Every page on this site is available as JSON. Append ?format=json to any record address and you get that record, the list of fields your plan does not include, the source link and the collection date.

Try it without a key

curl https://modelwatch.keelhelm.com/model/anthropic/claude-sonnet-4-6?format=json

The bulk API

For volume, the metered API lives on a separate host and takes a bearer key.

curl -H "Authorization: Bearer <your key>" \
  https://dataforge.keelhelm.com/v1/modelwatch/current

For agents

A machine-readable description of this dataset, its provenance and its URL patterns is at /llms.txt.

Attribution

Cite the source, not us: every page names where its data came from and links the official record. If you redistribute the data itself, the Business plan includes that grant.