The Sovereign AI Lab
We train AI models and specialised coding agents for organisations that need frontier capability inside secure environments.
In coalition with
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.
Real benchmarks. Real results.
Lumen is optimised for the outcomes that matter: shipping better code, faster, with fewer headaches.
Measures model performance across niche and legacy programming languages where standard coding benchmarks fall short.
Read more about Niche-BenchGPT-5.4
Gemini 3.1 Pro
GPT-5.5
Kimi K2.6
Lumen Outpost
Measures model performance across niche and legacy programming languages where standard coding benchmarks fall short.
Read more about Niche-BenchOur 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.
Less AI Slop
Optimised for maintainability, readability, and production-quality outputs, not bloated code generation.
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
Cosine CLI
Bring agentic engineering into your terminal. Run tasks in parallel with specialised sub-agents, connect tools through MCP, and stay in control with automatic checkpoints and IDE-grade language intelligence.
Cosine Cloud
Delegate long-running work to secure, isolated environments. Run tasks in parallel and review results as a team, with built-in controls for usage, model access, and spend.
Cosine Desktop
Work with agents across local files and tools in a native desktop workspace. Turn research, spreadsheets, and everyday tasks into work ready for review, while staying in control.
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.
Three models. One philosophy.
Lumen isn't a single model — it's a system designed for every layer of the development workflow.
Runs cheaply, operates on-device, and handles the heavy lifting around the coding loop.
- Capability
- Utility tasks, codebase mapping, retrieval, indexing
- Best for
- Large-scale support workflows
- Min GPUs
- 4 H100s