Lumen
The coding model that actually gets it — specialist coding AI (Cosine)
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Quick Answer
Lumen is the specialist coding model family from Cosine, built for engineering teams that need frontier capability inside secure environments. The lineup spans Scout for cheap on-device work, Outpost for everyday production tasks, and Sovereign for the hardest problems. Cosine post-trains it for enterprise and niche languages including COBOL, Fortran, Verilog, Rust and complex SQL. Plans run from $19/month Starter through $199 Team and $999 Enterprise, with single-tenant and air-gapped deployment available.
Lumen is an AI coding agent by Cosine, designed for real software engineering work within secure environments. It works in a terminal-native CLI with local-to-remote execution and in Cosine Cloud, where teams run multiple coding tasks in parallel and plan large changes together. Lumen is optimized for maintainability, readability, and production-quality outputs, supporting complex architectures.
Lumen is specifically post-trained on real production code for enterprise and niche languages (COBOL, Fortran, Verilog, Rust, complex SQL), enabling it to reason across complex architectures and legacy codebases, outperforming generalist models in secure, air-gapped environments.
Decision Intelligence
Best For
AIType
Starting Price
$0/mo
Free Trial
No
Credit Card
Not Required
Free Plan
Yes
Dimension Scores
· 6.1 avgHow good it is, across universal quality axes
Task Scores
· 6.9 avgWhat it can do, per category it works in · showing 9 of 10 tasks scoring 5+
Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →
Integrates with GitHub for code hosting and pull requests
Authenticates with ChatGPT for model access
Authenticates with Claude Max for model access
Auto-updated
Complexity
Company Size
Team Size
Skill Level
Deployment
The Model(s) Behind It
Model details — extracted from public vendor sources by our pipeline (Smart Generator + A3 cross-referencing) or admin-entered. Shown as claimed by the vendor; not independently audited by Intelloro.
Pricing verified from the vendor pricing page.
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User Reviews
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Who It's For4 rolesSoftware DevelopersComputer ProgrammersWeb Developers+1 more
Platform, Content & Languages1 content types1 languagesCodeEnglish+4 more
Output Languages
Content Types
Accepts
Produces
Frequently Asked Questions
Trust Score
Very Good
Based on 9 data signals
Confidence: High
Reflects publicly available data, not an independent audit
No published data
Not yet checked
Some details are AI-generated estimates — verify with the vendor.
AI-generated estimate: Best For, What Makes Unique
How we source dataAI Governance & Regulatory Disclosures
Legally-sensitive fields — extracted from public vendor sources by our pipeline (Smart Generator + A3 cross-referencing) or admin-entered. Shown as claimed by the vendor; not independently audited by Intelloro.
Switching & Migration
Company Name
Buildt AI Limited
Formerly
Genie
Founded
2022
Based in
United Kingdom
Last major update
May 2026
Funding
Seed · $3M