The LLM Price Index, as open data
Current LLM API prices across every provider we track — USD per 1M tokens, effective-dated, synced daily from primary sources. Free to use with attribution (CC BY 4.0).
Endpoints
Current prices, all providers — JSON
Same rows as CSV
90-day changelog: price changes, new models, deprecations
Point-in-time snapshot for citing a fixed version
Methodology
Prices are synced daily from primary sources (provider pricing pages and the maintained upstream price catalogs our price engine tracks), normalized to USD per 1M tokens, and effective-dated: when a price changes, the old row is closed and a new row opens, so history is never overwritten. Every row carries a verified_at timestamp — the moment our engine last confirmed that price against its source — and a source_url.
Input, cached-input, and output prices are tracked separately because providers price them differently; blended or tiered pricing (batch, long-context surcharges) is preserved upstream and reflected in headline rows where providers publish them. The same data powers the LLM API pricing index and cost calculator on this site — the published dataset is not a copy, it is the engine itself.
Corrections: if you find a price that disagrees with the provider's page, email support@stackspend.app — confirmed corrections ship within 24 hours and appear in the changelog.
License & citation
The dataset is licensed CC BY 4.0: use it freely — commercially, in research, in your own tools — with attribution linking back to this page. Suggested citation:
StackSpend LLM Price Index (CC BY 4.0) — https://www.stackspend.app/data
To cite a fixed version (for research or reproducibility), use a dated snapshot URL, e.g. /data/llm-prices/2026-08-04.