Cosine develops the Lumen family of specialized AI coding models and agents for software teams, with deployments ranging from public cloud to fully air-gapped environments.
About
Cosine is an AI research and product company, self-described as "The Sovereign AI Lab," that trains specialized coding models and coding agents for organizations that need strong AI capability inside secure environments. Its core argument is that models trained exclusively on real production code outperform general-purpose AI models at the tasks developers actually perform, such as navigating large codebases, implementing features, and maintaining long-lived systems.
The company's product line is built around the Lumen model family — Scout, Outpost, and the upcoming Sovereign — delivered through a terminal CLI, a desktop app, and a collaborative cloud workspace. Cosine places particular emphasis on serving organizations with strict security and compliance requirements, offering managed single-tenant and fully air-gapped deployments alongside its standard public cloud. It has also published an open letter on sovereign AI for the United Kingdom, backed by executives from critical national infrastructure sectors.
Key Features
Pricing & Fees
- Pricing: Three subscription tiers — Starter at $19/month (4M credits, $6.50 per 1M add-on credits), Team at $199/month (47M credits, $5.00 per 1M add-on credits), and Enterprise at $999/month (240M credits, $4.50 per 1M add-on credits). Private and air-gapped deployments are priced through sales.
- Credit-based usage: Credits cover agent work, model calls, and cloud execution; add-on credits can be purchased at any time.
- Installation: The CLI can be installed via Homebrew (`brew install CosineAI/tap/cos`).
- Security options: Public cloud, managed single-tenant cloud, and fully air-gapped deployments are available.
- Lumen Sovereign: The frontier-scale reasoning model is announced but not yet released.
Who It's For
Cosine is aimed at professional software teams rather than casual users. Its cloud tiers serve solo developers and growing teams, while its single-tenant and air-gapped options target highly regulated industries that must keep data inside their own security perimeter. It is especially relevant for engineering groups maintaining legacy systems in languages like COBOL and Fortran, organizations with cybersecurity requirements, and enterprises in sectors such as critical national infrastructure where sovereign AI capability is a priority.
FAQ
What is Cosine?Cosine is an AI company that trains specialized coding models (the Lumen family) and coding agents for organizations that need advanced AI capability within secure environments.
How much does Cosine cost?Plans start at $19/month for Starter, $199/month for Team, and $999/month for Enterprise, each with a monthly credit allowance; custom enterprise and private deployments are quoted by sales.
What platforms does Cosine run on?Cosine is available as a terminal CLI, a desktop app, and a cloud workspace, with deployment options spanning public cloud, managed single-tenant cloud, and fully air-gapped environments.
Does Cosine support older or uncommon programming languages?Yes, its models are post-trained for niche and enterprise languages including COBOL, Fortran, Verilog, Rust, and complex SQL, measured by its published Niche-Bench.
What about data privacy?Organizations with strict compliance requirements can run Cosine in a private single-tenant environment or fully air-gapped inside their own security perimeter.
Related Tutorials
View all →
Related Tools
View all →
OpenRouter OpenRouter is a unified, OpenAI-compatible API that gives developers pay-as-you-go access to 500+ AI models for text, image, video, and audio from 80+ providers. 
Google Antigravity Google Antigravity is Google's agentic development platform that lets developers build, automate, and verify software with AI agents across an IDE, desktop app, CLI, and SDK. 
Llama Llama 4 is a powerful AI model family with Scout and Maverick versions. Experience advanced AI capabilities. 
Tabnine - AI Code Completion Tabnine provides AI-powered code completion to boost developer productivity with personalized suggestions. 
Orca Orca is a free, open-source Agent Development Environment that runs CLI coding agents like Claude Code, Codex, and Gemini in parallel across isolated git worktrees.