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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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Perplexity
S
GitHub Copilot
B
Udio
A
Grammarly
A
TaglineAI search done right. Cited answers, not chat theater.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Suno's main rival. Often better on instrumental nuance.Grammar check + tone + AI drafting, everywhere you type.
Categoryresearchcodingaudiowriting
PricingFree + $20/mo ProFree (limited) + $10/mo Pro + $19/mo BusinessFree + $10-$30/moFree + $12-$15/mo Premium + team plans
Best forReplacing Google for any question where you want a cited answer in seconds.Teams with GitHub already. Devs who don't want to change IDEs.Musicians comparing AI outputs. Anyone who didn't click with Suno.Non-native English writers, business email, anyone who types a lot.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Strong instrumentals + genre fidelity
  • Extend/remix features
  • Good lyric understanding
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Same copyright gray zone as Suno
  • Ecosystem smaller
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Genuinely different vibe from Suno — worth trying both for a month.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
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