---
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](https://github.com/docketx) — [legal-scrambler](https://github.com/docketx/legal-scrambler) pseudonymises a case file on your own hardware before a frontier model sees it; [claude-for-legal](https://github.com/docketx/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](https://free.law) — 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](https://wiki.free.law/c/courtlistener/help/api).

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](https://huggingface.co/docketx). Site: https://docketrouter.ai/hll