Build T AI
Cosine trains AI models to write production-quality code.
At a glance
Starts at
from $19 per month
Price as published by the vendor, September 2026.
Free tier
No
Platforms
Web, macOS, Windows
Best for
Developers and teams building complex software.
Not for
Python and javascript developers
3.9 out of 5
Scored by Alex after real useOur verdict
Cosine excels in training specialised coding agents for secure environments. It's best suited for those needing exceptional maintainable code, but may be overkill for simpler projects or generalists.
✓What it does well
Specialised ModelsTrained exclusively on real production code from engineering teams.
Cross-Platform SupportWorks within a terminal-native interface and cloud solutions.
Customisable PricingFlexible plans starting at $19/month with add-on credits available.
✕Where it falls short
Limited to Niche LanguagesDoes not support mainstream languages like Python or JavaScript out of the box.
Air-Gapped Deployment ComplexityFits only air-gapped environments, which can be complex and costly to set up.
No Free TierAll plans start at $19/month with limited free credits for solo developers and side projects.
Key features
Air-Gapped SupportAvailable in fully air-gapped deployments.
Comprehensive Credit SystemCredits cover agent work, model calls, and cloud execution.
Red Team TrainingComing soon for security-focused training models.
Mainstream Language SupportSupport for popular languages like Python and JavaScript