● Covered by 1 source · 2 reportsMedium impact
Leanstral 1.5 Released with Enhanced Automated Theorem Proving
Key points
- Leanstral 1.5 features 119B total, 6.5B active parameters.
- Improves formal verification, solving 587/672 PutnamBench problems.
- Discovers 5 new bugs in repositories during testing.
- Available under Apache-2.0 license; accessible via Hugging Face.
- Optimized for automated theorem proving and autoformalization.
Leanstral 1.5 Release
Leanstral 1.5 has been released as the latest version of the Lean 4 formal proof engineering model. It includes an update to 119 billion total parameters, with 6.5 billion active for enhanced performance in theorem proving and code verification.
Performance Improvements
Leanstral 1.5 shows significantly improved performance in formal verification tasks, correctly solving 587 out of 672 PutnamBench problems. It has also set new state-of-the-art results on benchmark tests FATE-H with 87% and FATE-X with 34%.
Practical Applications
In practical applications, Leanstral 1.5 demonstrates its utility by uncovering 5 previously unknown bugs in 57 tested repositories. This capability is made more accessible through its open-source availability under the Apache-2.0 license.
Availability and Access
Leanstral 1.5 can be accessed for free through Hugging Face and a public API, allowing broad access to its powerful proof engineering and verification capabilities in Lean 4.
✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →
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Primary sources
GitHub mistralai/LeanstralSafeVerify GitHub mistralai/FLTEval GitHub datrs/varinteger GitHub oOo0oOo/lean-lsp-mcpHow outlets covered it
Leanstral 1.5 has been released, showcasing improved performance in formal verification tasks. It correctly solves 587 out of 672 PutnamBench problems and uncovers 5 new bugs in tested repositories, proving its practical utility in code verification.
Leanstral 1.5 introduces an updated Lean 4 formal proof engineering model with optimizations for automated theorem proving and autoformalization. This version features a total of 119 billion parameters, with 6.5 billion active parameters, offering improvements in speed and performance.