Compare AI tools

	Runway S	Writesonic B	Claude Code S	Cursor S
Tagline	The pro's AI video tool. Gen-4 is the current bar.	SEO-first AI writer. Optimized for ranking content.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	VS Code fork that made AI coding actually work.
Category	video	marketing	coding	coding
Pricing	Free + $15-$95/mo	Free + $15-$99/mo	Part of Claude Pro/Max/Team plans	Free + $20/mo Pro + $40/mo Business
Best for	Marketing video, pitch decks, b-roll, creative shorts.	Content marketers churning out SEO articles.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	Developers. Non-developers who want to ship working code.
Strengths	Most mature video workflow Character consistency via Act-One Gen-4 quality is production-grade	SEO built-in (Surfer integration) Article generator for long-form Chatsonic for research	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Tab completion feels like mind-reading Composer for multi-file edits Runs Claude, GPT, Gemini — you pick
Weaknesses	Expensive at scale Still needs post-editing	Output quality behind Claude for polish SEO automation can produce generic content	Terminal-based — learning curve Can't be used without Claude subscription	Can feel overwhelming for non-coders Expensive at scale
Kai's verdict	S-tier. Market leader with reason. Start here for serious video.	B-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	S-tier for coding. If you write code of any kind, this pays back the $20 in a day.
Link	Open →	Open →	Open →	Open →