license: cc-by-4.0
language:
- en
task_categories:
- question-answering
size_categories:
- n<1K
configs:
- config_name: tx
data_files: hll-0.1-tx.jsonl
tags:
- legal
- law
- benchmark
- legal-reasoning
- texas
- caselaw
- evaluation
- llm-evaluation
pretty_name: Humanity's Last Lawsuit (public split)
Humanity's Last Lawsuit — public split
Code & tools: github.com/docketx — legal-scrambler pseudonymises a case file on your own hardware before a frontier model sees it; claude-for-legal is the Claude Code plugin (
docketx-open-law) that loads these datasets and checks citations against them.
Source & credit — Free Law Project / CourtListener
HLL items are authored against real appellate opinions, and part of that record comes from
CourtListener. Measured on this public Texas split (115 items): 103 cite an official Texas courts
URL as their source of record and 12 cite https://www.courtlistener.com directly; the DocketX
opinion corpus the bank is drawn from (docketx/us-caselaw, docketx/texas-caselaw) is the Free Law
Project / CourtListener bulk export of 2026-06-30. CourtListener is a project of
Free Law Project — a 501(c)(3) non-profit building free public access to American
law since 2010. This benchmark does not exist without that record.
Free Law Project is a non-profit, and it is worth supporting: https://free.law/donate/. If this data is useful to you, credit Free Law Project and CourtListener too, and consider going straight to the source: CourtListener runs its own API and MCP server.
The public split of HLL, a legal-reasoning benchmark built from REAL appellate opinions with the parties redacted. Each item: blinded facts + a question whose gold answer (disposition, controlling standard, authorities) is the court's actual decision — grading is fully mechanical against the source opinion; no model judges another model. The private leaderboard split is withheld.
Per-jurisdiction configs are added as each state's bank matures (Texas first; California in development on the same pipeline). Item provenance: every item carries its source docket, author and critic models, and verbatim evidence quotes from the opinion.
Built by DocketX from the public record — the same team behind the us-caselaw 51-jurisdiction series. Site: https://docketrouter.ai/hll