Monolith-1.0 · Released July 17, 2026
Monolith.
The frontier is open. Monolith-1.0 leads every major reasoning benchmark, and its weights are on Hugging Face.
First place,
on everything that matters.
Reasoning, math, science, and long-context analysis. Evaluation protocols and reproduction details are published alongside every release.
* Evaluated using Basalt's internal harness. Full methodology in the technical report.
Model card
Specifications.
Full model card, evaluations, and training details available in the paper.
Parameters
1.6T total / 49B active
Architecture
Mixture of Experts, 128 experts
Context window
1,048,576 tokens
Training compute
1.8 × 10²⁵ FLOPs
Training data cutoff
December 2025
Availability