Trae

Trae is ByteDance's fork of VS Code with two models baked in: Claude 3.5 Sonnet and DeepSeek V3. The pitch is simple: free, unlimited access to frontier models without leaving your editor. No API keys, no credits, no usage caps. The autonomy comes via Builder mode, which handles multi-file edits and can scaffold entire features. I tested it on a Next.js dashboard refactor: asked it to extract a data table into a reusable component, wire up server actions, and add loading states. It created four new files, updated three existing ones, and got the imports right on the first pass. That's the kind of task where context windows and file coordination matter, and Trae handled it without me babysitting each step. Vibe coding is the other mode: conversational, iterative tweaks. Less autonomous, more like GitHub Copilot Chat but with Claude's reasoning. Useful for exploratory work where you don't yet know what you want. The catch: it's ByteDance. If you work on sensitive codebases or have compliance requirements, this is a non-starter. There's no self-hosted option, no enterprise tier, no data residency guarantees. The privacy policy is vague on training data. For side projects and open source work, that's fine. For client code or proprietary systems, it's a risk most teams won't take. Performance is solid. DeepSeek V3 is fast and cheap to run, so responses come back quickly even for large diffs. Claude 3.5 Sonnet is the same model you'd pay for elsewhere, just wrapped in a cleaner interface. The editor itself is VS Code 1.96, so extensions and keybindings carry over. Compared to Cursor or Windsurf, Trae is less polished but costs nothing. Cursor's agent mode is more reliable for complex refactors, and Windsurf's Cascade handles context better across sessions. But both charge monthly fees. If you're a student, hobbyist, or just want to try agent-assisted coding without a credit card, Trae is the obvious pick. Failure modes: it sometimes hallucinates file paths in monorepos, and the undo stack can get messy if Builder mode makes a mistake halfway through. No inline diff view yet, so reviewing changes means opening the git panel. Also, no support for local models or custom endpoints, so you're locked into ByteDance's infrastructure.