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Less AI Slop
Optimized for maintainability, readability, and production-quality outputs, not bloated code generation.
AI engineering you control.
Hand off complex coding tasks without sacrificing maintainability or visibility.
cosine·Configure production deployment with Argo
cosine·Configure production deployment with Argo
Cosine
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Terminal
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1 Work where you already are
The same autonomous engineer across desktop, cloud, and terminal.
cosine — session
Type, paste or import your task…
Desktop
Start in the Cosine app
A richer workspace for active engineering: multi-window workflows, visible agent state, reviewable changes, and a clean bridge into cloud execution.
/desktopcosine.sh/platform
Auth Refactor
OPEN
Cloud
Collaborate in the cloud
Run work in parallel, keep long-running tasks moving, and give engineers, PMs, and stakeholders one shared place to plan, review, and ship.
/cloudtmux — ~/w/cosine
What was removed:
Ready · 3 files +34 −339204.6k↑ · 32.9k↓
Terminal
Keep going in the terminal
Stay in a terminal-native workflow with local-to-remote execution, MCP tool access, project context, and multi-agent orchestration from the command line.
/cli Lumen
Introducing Lumen
Lumen is Cosine’s family of production-first coding models, built for real engineering work: maintainable software, long-lived systems, and the complex codebases most models struggle to handle.
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.
Trusted by Engineers at
Unlock value at every stage of the SDLC
Work scoping & management
Triage and de-duplicate backlog items, cluster related work into coherent packages, estimate effort from historical data, propose owners based on expertise, and produce short execution plans with risks and acceptance criteria.
One account · one toolchain · no migration
Move between surfaces any time
Start local. Scale when you're ready.
Cosine is one product across three surfaces: CLI, Desktop, and Cloud.
Each extends the last — nothing is thrown away when you go further.
The desktop is the hub. When you want to run tasks overnight, spin up
20 agents in parallel, or keep working from your phone while your
laptop runs a long job — the cloud is already connected. Same account,
same context, no migration.
- → CLI for terminal-native power users and scripting
- → Desktop for rich interaction, multi-window, visibility
- → Cloud for parallel agents, remote execution, cross-device continuity
- → All three share the same account and model settings
Enterprise deployment
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
Managed single-tenant
Air-gapped
*
Onboard today
Public cloud
Fully managed Cosine for teams whose requirements fit our standard cloud controls.
The fastest way to adopt Cosine with a fully managed product experience and no infrastructure to maintain.
Instant access to the latest Cosine models, product updates, collaboration features, and cloud execution.
Ideal for rapid evaluation, team rollout, and customers whose requirements fit our standard cloud controls.
Managed single-tenant cloud
A private Cosine environment operated for your organisation with enterprise controls.
Dedicated Cosine environment for your organisation, designed for enterprise isolation and predictable controls.
Connect to your network, identity, repositories, and policy requirements while Cosine manages the platform.
Best for teams that need private data boundaries without operating every part of the stack themselves.
Fully air-gapped
For organisations that need Cosine to run entirely inside their own security perimeter.
Run Cosine entirely inside your own infrastructure with no external dependencies and no data egress.
Deploy against strict isolation, regulatory, and classified-network requirements without compromising workflow quality.
Option to post-train or fine-tune models for internal codebases, frameworks, and legacy languages.
Recent highlights
View all blog posts →
May 13, 2026 · Insights
Lumen Outpost Benchmark Report
Alistair Pullen May 13, 2026 · Insights
Training Against Slop: A Structured Approach to AI Code Quality
Alistair Pullen May 13, 2026 · Insights
Training for Niche Languages: The Data Engine for Legacy Systems
Alistair Pullen May 13, 2026 · Insights
Training for Vibe: A Structured Approach to AI Behavior
Alistair Pullen Start building
Ready to build? Get started with Cosine.
On your Desktop, in your CLI, with seamless handoff to the Cloud.
