The coding
agent built for
agent built for
Deploy anywhere: on-premise, fully air-gapped, or in your secure cloud
Trusted by Engineers at
What makes Cosine different?
Cosine isn’t just a coding agent. We’re also a machine learning
research lab that post-trains AI models on high-quality human coding
data, in collaboration with OpenAI.
The outcome? State-of-the-art coding accuracy, whether you’re
on-premise or in the cloud. An an agent tailored to your context and
your code.
Run Cosine where you need it - on our cloud, your VPC, or fully
on-premise, airgapped. Use your preferred models or custom-trained
ones.
Optimized for on-premise:
We post-train any open-source model of your choice, optimising it
specifically for coding. The result is maximum accuracy per GPU and
full control over your infrastructure.
Best-in-class accuracy in the cloud:
Our default model - post-trained on GPT-5 - already outperforms
OpenAI and Anthropic in coding accuracy and reliability.
Custom post-training for your context:
We can train a model on your own repos, frameworks, or specific
languages (like COBOL or Fortran), creating an agent with a deep
understanding of your internal systems and legacy code.
Got specific requirements? Tell us, and we'll meet them
Explore our research
The impact our customers have seen
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Increase in A/B testing through Cosine
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Faster iteration on new features by junior developers
0 minutes
Time taken to clear 10 days’ worth of backlog
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Time taken to move a mature 2 million line codebase to AWS
“Cosine shows what it looks like when AI works like a real-world developer. Genie 2 mirrors how engineers reason through complexity. It’s a foundational leap for software development.”
Laura Modiano, OpenAI Start-Ups EMEA lead
“I definitely see Cosine as one of the leading contenders in agentic programming. Most others just can’t do it, and they're cracking the code. The way Cosine has fine-tuned their model is particularly impressive: it ensures that the agent actually behaves well and digests a lot of context, which other providers consistently struggle with.”
Nick Hughes, Technical Director
Cosine fits perfectly with agile and buddy programming it’s like having an AI partner. Both junior and senior developers picked it up instantly. It’s boosted productivity and become part of our team.”
Cris Flagg, CEO, Flagg Consulting
How customers are using Cosine
Asynchronous, multithreaded feature development
Comprehensive bug scanning, fixing and test writing
Large scale refactors and library updates
Auto generated and always up-to-date documentation
Accelerate new engineer on-boarding for unfamiliar repos
Assign tasks directly from your favourite work tools
Safety, Trust & Transparency
Cosine is built for enterprises where trust isn’t optional. Every line
of code, every output, every decision is handled with the highest
standards of security and compliance - far beyond what other AI tools
can offer.
Your IP stays yours
All inputs and outputs remain your intellectual property.
Enterprise-grade compliance
SOC 2 attested, ISO 27001 aligned.
Full visibility
Audit logs and fine-grained access controls, built in.
Seamless integration
Works with your identity provider (IdP) for airtight access.
Zero data leakage
No training on shared models. Your code never leaves your environment.
Private deployments
On-prem or VPC air-gapped isolation options ensure full control.
Regulatory alignment
Designed for strict regimes like FINRA, HIPAA, ITAR, GDPR.
Red-team tested
Adversarial testing to prove resilience against attacks.
Encryption everywhere
Data is encrypted at rest and in transit with enterprise-grade keys.
Granular governance
Role-based access and policy enforcement tailored to sensitive orgs.
Customer-controlled retention
You decide what’s stored, for how long, or whether at all.
No shadow AI
No “mystery” training data, no co-mingling with public models.
Continuous compliance
Optional real-time monitoring and alerts on usage anomalies.
Defence-grade hardening
Designed to fit into zero-trust environments.