Compare AI tools

	Runway S	GitHub Copilot B	Aider A	Kling A
Tagline	The pro's AI video tool. Gen-4 is the current bar.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Terminal-based AI pair programmer. Git-aware, model-flexible.	Kuaishou's video model. The surprise standout.
Category	video	coding	coding	video
Pricing	Free + $15-$95/mo	Free (limited) + $10/mo Pro + $19/mo Business	Free (open source) + whatever API you use	Credit-based, free trial
Best for	Marketing video, pitch decks, b-roll, creative shorts.	Teams with GitHub already. Devs who don't want to change IDEs.	Developers who want open-source tooling with full control.	Anyone who wants top-tier video quality for less.
Strengths	Most mature video workflow Character consistency via Act-One Gen-4 quality is production-grade	Great enterprise story Works in your existing IDE Chat + autocomplete	Works in any terminal Auto-commits changes with meaningful messages Works with any model (Claude, GPT, local) Minimal learning curve	Very strong motion + physics Often beats Runway on realism Great price
Weaknesses	Expensive at scale Still needs post-editing	Less agentic than Cursor/Claude Code Model quality varies	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly	UX is rough for English speakers Queue times
Kai's verdict	S-tier. Market leader with reason. Start here for serious video.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier. The right answer if you want open-source + terminal-native + model-agnostic.	A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.
Link	Open →	Open →	Open →	Open →