Updated April 29, 2026
Devin by Cognition is the first fully autonomous AI software engineer. It can plan, write code, debug, deploy, and handle entire development tasks from start to finish using its own code editor, terminal, and browser. Devin works alongside human engineers on real-world codebases, handling tasks like bug fixes, feature implementations, and codebase migrations with minimal human intervention.
OpenCode is an open-source AI coding agent built for the terminal by Anomaly. It connects to 75+ LLM providers via Models.dev, supports parallel agent sessions on the same project, and has a privacy-first design — no code or context data is ever stored. Available as a TUI, IDE extensions, and a beta desktop app for macOS, Windows, and Linux.
Core capabilities each platform advertises.
What each tool does well, and the limitations to keep in mind.
Pros
Cons
Pros
Cons
It was the first time I felt like I could write up a large prompt, walk away from my laptop, and come back to a lot of work having been done.
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Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 500+ models through one gateway.