Cosine

What is Cosine?

Cosine is an AI company that builds models and coding agents for organizations needing frontier capability inside secure environments. Its thesis is that specialists outperform generalists, so it trains models exclusively on production code. Its backers include BAE Systems, HSBC, Lloyds, PwC and Deloitte.

Key capabilities of Cosine

• Lumen Scout: budget model based on Devstral 123B for on-device use
• Lumen Outpost: everyday production model derived from Kimi K2.6
• Lumen Sovereign: upcoming frontier-scale model for complex engineering
• Legacy and niche languages: COBOL, Fortran, Verilog and specialized SQL
• CLI access: command-line interface
• Cloud collaboration platform: team access in the cloud

How Cosine works

Teams use Cosine from the CLI or its cloud platform, and agents work on codebases using models trained on production code. Deployment can be the standard cloud, a managed single-tenant private environment or a fully air-gapped install in the customer's infrastructure.

Who uses Cosine?

Regulated and security-sensitive organizations, including UK and European financial and defense firms, use Cosine, especially for legacy systems and complex architectures.

Cosine pricing

Cosine does not publish pricing on its homepage. Contact the vendor for a quote.

Cosine alternatives

Cosine is compared with Claude Code, Gemini Code Assist and AskCodi. Claude Code and Gemini Code Assist run on general-purpose models, while Cosine trains its own code-specific models.