June 30, 2026Blog
Public Previewv1.5
Leanstral 1.5
An updated Lean 4 formal proof engineering model optimised for automated theorem proving and autoformalization. 119B total parameters, 6.5B active.
Speed
Performance
Modalities
Context
256k
Max output
128k
Price
$0
Speed
Performance
Modalities
Context
256k
Max output
128k
Price
$0
Other Models
