Reasoning systems

Systems that think with you

Halcyon helps individuals and teams explore, draft, and build with reliable reasoning. Fast, capable, and easy to deploy at work.

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For every kind of work

Assistant

Ask, iterate, and summarize. A fast, dependable companion.

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Code

Generate tests, refactor safely, and document your systems.

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Vision

Create visuals and explain what you see with ease.

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Audio

Transcribe meetings and talk with your documents.

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Halcyon for business

Safer deployment, stronger outcomes

Admin controls, private spaces, and evaluations make it easy to roll out reasoning to your whole company.

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From the lab

Research · Sep 2026 Evaluation techniques for stepwise reasoning

Publication · Aug 2026 Tool use as a first-class planning primitive

Company · Aug 2026 What reliable reasoning means for productivity