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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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Grammarly
A
NotebookLM
S
Pika
A
Cursor
S
TaglineGrammar check + tone + AI drafting, everywhere you type.Google's research notebook. Turns your docs into a podcast.The playful, accessible AI video tool.VS Code fork that made AI coding actually work.
CategoryWritingResearchVideoCoding
PricingFree + $12-$15/mo Premium + team plansFreeFree + $8-$58/moFree + $20/mo Pro + $40/mo Business
Best forNon-native English writers, business email, anyone who types a lot.Students, researchers, anyone with a stack of PDFs or a topic to learn.Social media creators, beginners, anyone wanting quick fun clips.Developers. Non-developers who want to ship working code.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
  • Ingredients feature — combine people, objects, scenes
  • Lip sync + sound effects
  • Fun, approachable UX
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Google-only
  • Can be slow on large corpora
  • Lower fidelity than Runway/Kling
  • Still rough on complex scenes
  • Can feel overwhelming for non-coders
  • Expensive at scale
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.A-tier for social/casual. B-tier for serious work. Good entry point.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.
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