Compare AI tools

	GitHub Copilot B	Lex A	Runway S	Grammarly A
Tagline	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Google Docs with an AI collaborator baked in.	The pro's AI video tool. Gen-4 is the current bar.	Grammar check + tone + AI drafting, everywhere you type.
Category	coding	writing	video	writing
Pricing	Free (limited) + $10/mo Pro + $19/mo Business	Free + $12/mo	Free + $15-$95/mo	Free + $12-$15/mo Premium + team plans
Best for	Teams with GitHub already. Devs who don't want to change IDEs.	Essays, long-form drafts, thinking on the page.	Marketing video, pitch decks, b-roll, creative shorts.	Non-native English writers, business email, anyone who types a lot.
Strengths	Great enterprise story Works in your existing IDE Chat + autocomplete	Clean writing UX — distraction-free +++ prompt triggers AI help Collaboration + AI feedback together	Most mature video workflow Character consistency via Act-One Gen-4 quality is production-grade	Works in every browser/app Now has generative AI (GrammarlyGO) Tone detection + suggestions
Weaknesses	Less agentic than Cursor/Claude Code Model quality varies	Less feature-rich than Google Docs AI ceiling below dedicated tools	Expensive at scale Still needs post-editing	Can feel naggy Premium features gate basics Privacy concerns (reads your writing)
Kai's verdict	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.	S-tier. Market leader with reason. Start here for serious video.	A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
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