I went down a rabbit hole this morning reading the December 2025 AI tool roundups on Juejin, and I figured I'd write down what actually stuck with me. Most of these lists blur together after a while, but a few patterns are worth talking about.
The first thing that jumped out is how crowded the coding-assistant space has become. Cursor is still the 800-pound gorilla — the numbers I saw suggested around 35% of the AI coding market and a couple million paying users. Vibe-wise I get it; it feels like a real fork of VS Code rather than a plugin bolted on. The marketing around $500M ARR is honestly hard to ignore, though I'd take any ARR figure from a private company with a grain of salt. The thing I keep hearing from people I trust is that the agent mode is where Cursor pulls away — you ask it to refactor something across 6 files and it actually does it without you babysitting every step. Whether that's better than Claude Code's terminal-first approach is a separate debate, but they're both clearly winning for different reasons.
GitHub Copilot is still the default. It's not the flashiest anymore, but the ecosystem integration is brutal to compete with. When your whole workflow is already in VS Code and your PRs live on github.com, having the assistant just be there is more valuable than any single benchmark win. The $10/month entry price also matters more than people admit. Most of the people I know who "picked a tool" actually just never un-picked the one they already had.
