Cosine is an AI software engineer built to handle the real complexity of production codebases. Powered by Genie 2, a proprietary model purpose-designed for advanced coding tasks, Cosine doesn’t just autocomplete — it works end-to-end. It understands your repo, plans the work, writes and tests code, runs shell commands, and even opens pull requests. Whether it’s feature development, bug fixes, or large-scale refactors, Cosine acts like a reliable teammate who never sleeps.
What makes Cosine different is its ability to work asynchronously across multiple tickets. Developers can assign a messy backlog or a set of issues all at once, and Cosine will break them down into subtasks, execute in parallel, and return clean, review-ready PRs. This autonomous workflow means teams can move faster without disrupting their existing process — Cosine integrates seamlessly with Slack, Jira, Linear, and your CLI, meeting developers exactly where they already work.
Benchmarks back up the claims: Cosine’s Genie 2 model achieved a 72% pass rate on SWE-Lancer, a real-world coding benchmark representing over $236k of tasks — outperforming both OpenAI and Anthropic on production-grade development. By combining multi-agent orchestration with deep code understanding, Cosine enables teams to clear backlogs, accelerate prototyping, and maintain code quality with less human intervention. In short, it’s the most efficient AI coding agent for real software engineering.
