Version 1.0 data, as of 13 October 2026

README.md

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+---
+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 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](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 1.0.0). 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.
+```

estimates.csv

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+definition,days,outcome,estimate,ci_low,ci_high,at_risk
+main,30,price,0.059072,0.05261,0.06606,3682
+main,30,retirement,0.035134,0.03019,0.040379,3682
+main,30,removed,0.10185,0.093864,0.110636,3682
+main,30,none,0.803944,0.792771,0.814776,3682
+main,90,price,0.085579,0.077579,0.093629,2717
+main,90,retirement,0.05186,0.045302,0.058636,2717
+main,90,removed,0.132793,0.123809,0.142673,2717
+main,90,none,0.729768,0.717657,0.741825,2717
+main,180,price,0.108513,0.098835,0.118261,2336
+main,180,retirement,0.077049,0.069372,0.0849,2336
+main,180,removed,0.141605,0.132812,0.151232,2336
+main,180,none,0.672832,0.658483,0.686147,2336
+main,365,price,0.146828,0.13538,0.158653,1214
+main,365,retirement,0.163993,0.15198,0.177241,1214
+main,365,removed,0.163389,0.15281,0.174451,1214
+main,365,none,0.525791,0.50923,0.542899,1214
+main,730,price,0.182766,0.169272,0.19692,379
+main,730,retirement,0.295194,0.276343,0.313827,379
+main,730,removed,0.23362,0.217222,0.249913,379
+main,730,none,0.288421,0.267706,0.312241,379
+headline,30,price,0.051013,0.044901,0.057234,3699
+headline,30,retirement,0.035171,0.030217,0.040408,3699
+headline,30,removed,0.10306,0.094863,0.112099,3699
+headline,30,none,0.810757,0.799502,0.821612,3699
+headline,90,price,0.075741,0.068334,0.083188,2736
+headline,90,retirement,0.051962,0.045401,0.058737,2736
+headline,90,removed,0.134349,0.125313,0.14427,2736
+headline,90,none,0.737949,0.725446,0.749954,2736
+headline,180,price,0.095715,0.087056,0.105212,2353
+headline,180,retirement,0.079214,0.071308,0.087116,2353
+headline,180,removed,0.143205,0.134326,0.152901,2353
+headline,180,none,0.681866,0.668453,0.694705,2353
+headline,365,price,0.125301,0.114968,0.136559,1240
+headline,365,retirement,0.168095,0.155862,0.181383,1240
+headline,365,removed,0.166198,0.155605,0.177206,1240
+headline,365,none,0.540405,0.52353,0.55738,1240
+headline,730,price,0.158343,0.145157,0.17206,381
+headline,730,retirement,0.307056,0.287782,0.325965,381
+headline,730,removed,0.238387,0.22193,0.254907,381
+headline,730,none,0.296214,0.275058,0.319636,381
+no_first_week,30,price,0.029108,0.024243,0.034213,3817
+no_first_week,30,retirement,0.035316,0.030389,0.040595,3817
+no_first_week,30,removed,0.10469,0.096659,0.113617,3817
+no_first_week,30,none,0.830886,0.820249,0.841357,3817
+no_first_week,90,price,0.05595,0.049452,0.062893,2840
+no_first_week,90,retirement,0.053218,0.046531,0.060081,2840
+no_first_week,90,removed,0.135501,0.126759,0.145289,2840
+no_first_week,90,none,0.75533,0.74263,0.767146,2840
+no_first_week,180,price,0.079466,0.071263,0.088598,2444
+no_first_week,180,retirement,0.078971,0.071354,0.087069,2444
+no_first_week,180,removed,0.144228,0.135467,0.154026,2444
+no_first_week,180,none,0.697334,0.683507,0.71083,2444
+no_first_week,365,price,0.120479,0.110204,0.131301,1224
+no_first_week,365,retirement,0.167625,0.155399,0.180727,1224
+no_first_week,365,removed,0.166628,0.156466,0.177887,1224
+no_first_week,365,none,0.545268,0.528133,0.562385,1224
+no_first_week,730,price,0.157453,0.144336,0.170861,379
+no_first_week,730,retirement,0.304983,0.285422,0.324293,379
+no_first_week,730,removed,0.240236,0.22384,0.256998,379
+no_first_week,730,none,0.297328,0.276258,0.321523,379
+real_only,30,price,0.03491,0.029856,0.040486,3802
+real_only,30,retirement,0.035993,0.030883,0.041335,3802
+real_only,30,removed,0.029767,0.025236,0.034892,3802
+real_only,30,none,0.89933,0.890842,0.907598,3802
+real_only,90,price,0.062317,0.055,0.070238,2830
+real_only,90,retirement,0.054863,0.047962,0.061913,2830
+real_only,90,removed,0.037646,0.032522,0.043193,2830
+real_only,90,none,0.845174,0.833861,0.855877,2830
+real_only,180,price,0.086252,0.077444,0.095841,2451
+real_only,180,retirement,0.082863,0.074523,0.091085,2451
+real_only,180,removed,0.045572,0.039678,0.052004,2451
+real_only,180,none,0.785314,0.771573,0.797463,2451
+real_only,365,price,0.123623,0.11299,0.135509,1246
+real_only,365,retirement,0.186778,0.172303,0.201409,1246
+real_only,365,removed,0.057346,0.050291,0.064892,1246
+real_only,365,none,0.632254,0.615187,0.649981,1246
+real_only,730,price,0.16798,0.152916,0.183095,382
+real_only,730,retirement,0.349766,0.32749,0.372938,382
+real_only,730,removed,0.093993,0.082415,0.107088,382
+real_only,730,none,0.388262,0.362805,0.413436,382