KaiAI tutor for anyone

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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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Windsurf
A
Claude Agent SDK
S
Gemini
A
ChatGPT Operator
B
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Anthropic's SDK for building your own agents on Claude.Google's answer. Best integrated with Workspace + free for a lot.OpenAI's browser agent. Clicks and types on websites for you.
CategoryCodingAgentsChatbotsAgents
PricingFree + $15/mo ProAPI usage + SDK is freeFree + $20/mo Advanced (bundled with 2TB Drive)Included with ChatGPT Pro $200/mo
Best forDevelopers who want Cursor-like power for less money.Developers building custom agents for their own company/product.Anyone already on Google, research tasks, summarizing long documents.Power users willing to pay $200/mo for a browser bot.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
Weaknesses
  • Smaller community
  • Model selection more limited
  • Developer-only
  • You build the UI
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.S-tier for builders. The right primitives. What Kai is built on under the hood.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.B-tier. Still early. Manus is more flexible for less money.
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