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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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Cursor
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Genspark
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OpenRouter
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TaglineVS Code fork that made AI coding actually work.AI agent for deep search. Generates Sparkpages — full mini-reports.One API, every model. Pay-as-you-go, no subscriptions.
Categorycodingresearchdev platform
PricingFree + $20/mo Pro + $40/mo BusinessFree + $25/mo PlusPay per token — model-dependent
Best forDevelopers. Non-developers who want to ship working code.Travel planning, shopping comparisons, deep research where you want an artifact back.Developers experimenting across models. Apps that want fallback logic.
Strengths
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Sparkpages = curated multi-source mini-articles
  • Agent can book, compare, shop
  • Autopilot agent for long tasks
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Early-stage — rough edges
  • Less reliable than Perplexity for simple questions
  • Slight markup over direct API
  • Some provider features not exposed
Kai's verdictS-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. Bet on this one — the Sparkpage format is genuinely new.S-tier for model-shopping. I use this for every prototype before committing.
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