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Principled Machines

@PriMachAI

Principled Machines is an AI research company building Cortex, to power reasoning you can rely on.

 San Francisco, CA
principledmachines.com
Joined November 2026
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Hello, world. We’re Principled Machines. Language models are one form of intelligence. We’re building Cortex to combine them with algorithms, solvers, and reusable methods. Our bet: better models make the system around them more powerful. principledmachines.com/resea…
Reasoning as a systems problem — Principled Machines

Reasoning as a systems problem — Principled Machines

Frontier models are the kernel of a capable system. We are building the layer around them, a reasoning engine that forms an understanding of the task, makes it executable, and revises it when the...

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Sharing an early result: Sierra verified Cortex at 73.2% on τ³-benchmark. We build algorithmic complements to LLMs. We don’t fight what models do well. We fill in the rest. principledmachines.com/resea…
Cortex on τ³-bench — Principled Machines

Cortex on τ³-bench — Principled Machines

On τ³-bench banking, Cortex passed 73.2% of tasks, against 55.2% for the best published model. Sierra's own paper shows that finding the documents is half the problem. We describe how Cortex handles...

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