Compare AI tools
Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Dev Platform
Coding
Image
Productivity
Writing
Marketing
Cursor TypeScript SDK A | Cursor S | Grammarly A | Runway S | |
|---|---|---|---|---|
| Tagline | Wire Cursor's full coding-agent runtime into your own apps, scripts, and CI/CD pipelines with a few lines of TypeScript. | VS Code fork that made AI coding actually work. | Grammar check + tone + AI drafting, everywhere you type. | The pro's AI video tool. Gen-4 is the current bar. |
| Category | Dev Platform | Coding | Writing | Video |
| Pricing | Token-based; requires Cursor plan (Pro from $20/mo). Composer 2 at $0.50/$2.50 per M tokens (in/out); fast variant $1.50/$7.50 per M tokens. | Free + $20/mo Pro + $40/mo Business | Free + $12-$15/mo Premium + team plans | Free + $15-$95/mo |
| Best for | Engineering teams who already use Cursor and want to embed its coding-agent runtime into CI/CD pipelines, backend services, or internal developer tools without building agent infrastructure from scratch. | Developers. Non-developers who want to ship working code. | Non-native English writers, business email, anyone who types a lot. | Marketing video, pitch decks, b-roll, creative shorts. |
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| Kai's verdict | If your team is already in the Cursor ecosystem, this is a genuinely compelling way to turn ad-hoc AI coding sessions into durable, automated workflows — but the beta label and Cursor's history with opaque pricing mean you'll want to set hard budget guardrails before going to production. (Verdict pending Phi's full review.) | S-tier for coding. If you write code of any kind, this pays back the $20 in a day. | A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone. | S-tier. Market leader with reason. Start here for serious video. |
| Link | Open → | Open → | Open → | Open → |