Citation engineering

Harpd citation registry

Every factual claim on harpd.com resolves to a registered dataset, a methodology page and a data timestamp. The same records are available as machine-readable JSON at/data/citations.json and/data/claims.json.

• pricing:list-prices-verifiedOBSERVEDofficialsupported

  Every model price published on harpd.com is a public list price read from the provider's official pricing page, and each of the 16 records carries its own source URL and verification date (most recent verification 2026-08-18).

  Dataset:

  llm-pricing

  Last verified:

  2026-08-18

  Evidence:

  https://harpd.com/data/llm-pricing.json

  Canonical:

  https://harpd.com/llm-pricing/

• benchmark:json-extraction-v1MODELEDbenchmarksupported

  The Structured JSON extraction from messy natural-language input (en + ja + zh) benchmark dataset covering 8 models is a modeled estimate, not a measured result: it shows how the live benchmark will be scored and must not be cited as measured output (dataset generated 2026-08-18).

  Dataset:

  benchmarks

  Last verified:

  2026-08-18

  Evidence:

  https://harpd.com/data/benchmarks.json

  Canonical:

  https://harpd.com/benchmarks/

• rank:points-ruleOBSERVEDdatasetsupported

  Rank Points published for a product equal the Rank Credit spend that product completed (one completed Credit creates one permanent Rank Point). Rank Points are promotional placement, not an editorial quality score.

  Dataset:

  rank

  Last verified:

  2026-09-09

  Evidence:

  https://harpd.com/data/rank.json

  Canonical:

  https://harpd.com/data/

• rank:dataset-coverageOBSERVEDdatasetsupported

  The Harpd ranking dataset contained 143 approved products across 21 categories when it was last regenerated (2026-09-09); every record carries its own updatedAt timestamp.

  Dataset:

  rank

  Last verified:

  2026-09-09

  Evidence:

  https://harpd.com/data/rank.json

  Canonical:

  https://harpd.com/data/