---
license: mit
pretty_name: llmledger
language:
- en
tags:
- llm
- pricing
- litellm
- survival-analysis
- competing-risks
size_categories:
- 10K<n<100K
configs:
- config_name: changes
  data_files: changes.csv
  default: true
- config_name: models
  data_files: models.csv
- config_name: estimates
  data_files: estimates.csv
---

# 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 20 October 2026, 17:50 UTC (LiteLLM commit `e63aec0`), built with
llmledger version 1.19: the same data its live page showed that day. The first
upload (version 1.0 data, 13 October 2026) is in this repository's history.

- 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 (17,333 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 the change that undid it), `likely` (a likely correction: a price change in the model's first 7 days, from 0, or of 10 times or more either way), or empty |

### `models.csv`: one row per model (5,447 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, age in days for models still
listed with no exit, and the cache read and cache write prices in US dollars per
million tokens (the last two columns, added after version 1.0).

### `estimates.csv`: competing risks estimates (100 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. Five definitions: `main`, `headline` (input and output token
prices only), `no_first_week`, `real_only` (leaving out changes flagged bulk,
unit or reverted), and `likely_real` (also leaving out likely corrections).
In a labelled sample, about 6 in 10 first price changes were corrections of the
catalogue rather than real price changes, so `main` overstates real ones.

## 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](https://github.com/pouriaetab/llmledger/blob/main/docs/SPEC.md).

## Citation

Emami Tabrizi, P. (2026). llmledger: what happens to an LLM after it joins a
price catalogue (version 1.19.0). Zenodo. https://doi.org/10.5281/zenodo.23330454

## Licence and source

The data is derived from
[BerriAI/litellm](https://github.com/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

Copyright (c) 2023 Berri AI

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
```