Cosine

Cosine is an advanced AI-powered developer assistant designed to function as an autonomous software engineering agent, capable of performing complex coding tasks in real production environments. Unlike traditional coding tools, it operates independently, simulating the reasoning and workflow of a human engineer. It can handle a wide range of tasks, from fixing bugs and refactoring code to building new features, all while integrating seamlessly into existing developer workflows. The platform is designed to work asynchronously, allowing developers to assign multiple tasks and review completed pull requests at their convenience, without constant supervision. At the heart of Cosine is its proprietary AI model called Genie, which has set new benchmarks in software engineering AI performance. The first version, Genie 1, demonstrated superior reasoning and problem-solving capabilities, outperforming competitors in benchmarks like SWE-Bench. Its successor, Genie 2—also referred to as AutoPM—introduced multi-agent reasoning, enabling the AI to break down complex tasks into subtasks and autonomously execute them, resulting in production-ready pull requests.

With the integration of GPT‑5, it has further enhanced its capacity for in-depth reasoning, prioritization, and multi-step problem-solving, offering two operational modes: “Quick” for fast reasoning and “Think” for thorough, multi-agent deliberation. It is designed to blend seamlessly with popular tools like GitHub, Slack, Jira, and Linear, ensuring that teams can adopt it without disrupting their existing workflows. By automating routine tasks, it saves developers time, increases accuracy, and scales efficiently, even in large, complex projects. Beyond its technical capabilities, it emphasizes human-like reasoning, modeling its processes on the decision-making patterns of experienced engineers. This approach allows it to produce high-quality code that aligns with human logic and project requirements. Founded by a small team with deep engineering expertise, Cosine aims to codify and replicate human cognitive processes in software development, making it a revolutionary tool for teams seeking efficiency, reliability, and autonomous AI assistance in their coding workflows.