Less AI Slop
Optimised for maintainability, readability, and production-quality outputs, not bloated code generation.
We train AI models and specialised coding agents for organisations that need frontier capability inside secure environments.
Open Letter on Sovereign AI for the United Kingdom
We have published an open letter, supported by a coalition of executives from critical national infrastructure.
View Open LetterReal benchmarks. Real results.
Lumen is optimised for the outcomes that matter: shipping better code, faster, with fewer headaches.
Our thesis: specialists outperform generalists
Most AI models try to be everything to everyone. They write poetry, solve physics problems, and summarise novels.
Lumen does one thing: write exceptional software.
Our thesis is simple. A model trained exclusively on real production code, from real engineering teams will always beat a generalist at the task developers actually need.
That's why every training decision, every optimisation, every evaluation metric is grounded in a single objective: better code.
Built for Real Systems
Designed to reason across complex architectures, legacy infrastructure, and long-lived codebases.
Beyond Mainstream Languages
Post-trained for enterprise and niche languages including COBOL, Fortran, Verilog, Rust, and complex SQL.
Use Cosine wherever you work
Start in your terminal
Work within a terminal-native interface, with a local-to-remote execution model, external tool access via MCP, and multi-agent orchestration.
Collaborate in the Cloud
Run multiple coding tasks in parallel, plan large changes and collaborate across engineers, PMs, and stakeholders in a shared project.
Built to fit your security environment
Start quickly in Cosine Cloud, or move into a dedicated tenant or fully air-gapped deployment when your infrastructure, data, and compliance requirements demand it.
Public Cloud
Fully managed Cosine for teams whose requirements fit our standard cloud controls.
Managed single-tenant cloud
A private Cosine environment operated for your organisation with enterprise controls.
Fully air-gapped
For organisations that need Cosine to run entirely inside their own security perimeter.
Model family
Three models. One philosophy.
Lumen isn't a single model — it's a system designed for every layer of the development workflow.
ScoutPost-trained from Devstral 123B
OutpostPost-trained from Kimi K2.6
Ready to start building?
Get started with Cosine today.