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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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GitHub Copilot
B
Grammarly
A
Luma Dream Machine
A
Perplexity
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Grammar check + tone + AI drafting, everywhere you type.Smooth, cinematic motion. Image-to-video specialist.AI search done right. Cited answers, not chat theater.
Categorycodingwritingvideoresearch
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $12-$15/mo Premium + team plansFree + $10-$500/moFree + $20/mo Pro
Best forTeams with GitHub already. Devs who don't want to change IDEs.Non-native English writers, business email, anyone who types a lot.Photographers animating stills, cinematic b-roll.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Best image-to-video in the category
  • Great camera motion control
  • Ray 2 model produces striking shots
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Prompt fidelity below Runway
  • Queue times on free tier
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.A-tier. Best for cinematic image-to-video. Pair with Runway for coverage.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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