Data contracts / ledger

LLM token pricing

Point-in-time daily ledger of LLM token pricing — every move dated and sourced.

Coverage window

2026-07-12 → 2026-08-27 (1,178 rows)

Computed from the backing series at page-render time — never typed by hand.

History honesty

History accrues in place from the ledger start (2026-06-06) — append-only, never backfilled; depth before the start cannot exist.

Cadence

Ledger snapshots daily at 08:00 UTC; movements appear only when a value actually moves. Empty window = nothing moved.

Revision policy

Append-only: a frozen day is never edited or deleted (database-enforced). Corrections are registered in data_corrections and served alongside; restatements surface via /api/v1/changes.

Sources (source)

https://platform.claude.com/docs/en/about-claude/pricing (328) · https://ai.google.dev/gemini-api/docs/pricing (162) · https://api-docs.deepseek.com/quick_start/pricing (160) · https://developers.openai.com/api/docs/pricing (138) · https://docs.x.ai/docs/models (80) · https://www.together.ai/models/llama-4-maverick (80) · https://openai.com/index/advancing-the-price-performance-frontier-with-gpt-5-6 (52)

Known gaps

Known-gaps review pending — the coverage boundaries above are computed and current, but the curator’s qualitative gaps assessment has not been written yet. We state that rather than inventing one.

Access

Fully open

API: /api/v1/snapshot

Machine-readable

/api/v1/catalog/ledger-llm_pricing/contract