llmledger

Every change to LiteLLM's model price catalogue since 6 September 2023: models added and removed, prices changed, retirement dates set. Also one row per model, and estimates of how likely a newly added model is to have its price changed, get a retirement date, or be removed.

Data as of 13 October 2026, 01:26 UTC (LiteLLM commit c64c1c8). This is the same data as llmledger version 1.0.

• Code, method, specification and tests: https://github.com/pouriaetab/llmledger
• Live results, rebuilt every day: https://pouriaetab.github.io/llmledger/
• Archived release: https://doi.org/10.5281/zenodo.23330454

Not financial or procurement advice. The data describes edits to a public catalogue, not what any model costs you.

Files

changes.csv: one row per change (16,627 rows)

Column	Meaning
when	Time of the LiteLLM commit, UTC
sha	LiteLLM commit
model	Model name as LiteLLM lists it
kind	start (in the first version), added, removed, price (a field whose name contains cost or pricing changed), deprecation (the retirement date changed)
field	The field that changed, for price and deprecation rows
old, new	Value before and after, as JSON (null when absent)
flag	bulk (removed on a day with 50 or more removals), unit (a price made 100 times larger or smaller), reverted (undone within 30 days), or empty

models.csv: one row per model (5,275 rows)

Model name, a grouped maker and name from naming rules (for example, eu.anthropic.claude-3-5-sonnet-20241022-v2:0 becomes anthropic / claude-3.5-sonnet), host, mode, status, dates added and removed, retirement date, input and output price in US dollars per million tokens, number of price changes (leaving out flagged ones), first exit, and age in days for models still listed with no exit.

estimates.csv: competing risks estimates (80 rows)

Aalen-Johansen cumulative incidence of each first exit (price change, retirement, removal, none) at 30, 90, 180, 365 and 730 days after a model was added, with 95% bootstrap intervals (1,000 resamples) and the number of models still followed. Four definitions: main, headline (input and output token prices only), no_first_week, and real_only (leaving out flagged changes).

How it was built

Every version of model_prices_and_context_window.json on LiteLLM's main branch was read in order with git and compared with the one before. The full method, definitions and known limitations are in the specification.

Citation

Emami Tabrizi, P. (2026). llmledger: what happens to an LLM after it joins a price catalogue (version 1.0.0). Zenodo. https://doi.org/10.5281/zenodo.23330454

Licence and source

The data is derived from BerriAI/litellm, which is available under the MIT licence below, and is shared under the same licence. llmledger is independent and not affiliated with or endorsed by BerriAI.

MIT License

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