Devin, built by Cognition AI, is positioned as the first fully autonomous AI software engineer. Give it a task - fix this bug, build this feature, deploy this service - and it opens a terminal, writes code, runs tests, browses documentation, and iterates until the job is done, all without human intervention between steps. The benchmarks are impressive. Devin resolves real GitHub issues at a rate that embarrasses prior autonomous coding attempts. In practice, it handles well-defined, contained tasks reliably, though complex architectural decisions and ambiguous requirements still benefit from human oversight. At $500/mo for early access tiers, Devin targets teams willing to pay for genuine task offload rather than assisted coding. The category it's building - agentic software engineering - is where the entire AI coding space is heading.