miniCTX tests theorem provers on long, unseen project context

The benchmark draws theorems from real Lean projects and textbooks and includes tooling for extracting new project contexts.

What happened?

miniCTX introduced Lean theorem-proving tasks with repository context spanning up to tens of thousands of tokens and showed that context-aware methods outperform state-only baselines.

Why it matters

It better approximated the conditions faced by practical proof agents operating inside large formal codebases.

Significance rationale: miniCTX moved evaluation toward repository-scale theorem proving where definitions and lemmas live in long, previously unseen context.

Historical context

Primary evidence

Evidence & status at a glance

Significance
H2 · Field milestone
Verification
Paper released
Evidence level
E3 · Inspectable artifact
AI role
Computation only
Formal assurance
Artifact available

How should these labels be read? →

Contribution & verification

Mathematical novelty
Tooling only
Interface
Formal, Symbolic
AI contribution
Models must retrieve and use relevant definitions and lemmas from long project context while proving.
Human contribution
Researchers constructed the benchmark and ntp-toolkit for context-aware theorem-proving data extraction.
Verification
Paper released · E3 · Inspectable artifact · Artifact available
Last reviewed
2026-09-11

Technical details

Systems
minictx, ntp-toolkit, lean
Organizations
carnegie-mellon-university
Problems
repository-level-theorem-proving
Methods
long-context, retrieval, benchmarking

Sources & artifacts

Verification history

  • 2024-08-05 · Paper released · E2 · Research record

    The Chronicle records this event from the cited primary or official source; the status does not imply independent Chronicle verification.

  • 2026-09-11 · Paper released · E3 · Inspectable artifact

    This corpus refresh added a directly inspectable public artifact maintained by the authors or releasing organization. E3 records artifact-level inspectability and does not imply independent verification of the underlying scientific or mathematical claim.

Corrections

No corrections recorded.