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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 Code
S
Genspark
A
Claude Agent SDK
S
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Anthropic's CLI agent. Opus-powered, operates on your repo directly.AI agent for deep search. Generates Sparkpages — full mini-reports.Anthropic's SDK for building your own agents on Claude.
Categorycodingcodingresearchagents
PricingFree + $15/mo ProPart of Claude Pro/Max/Team plansFree + $25/mo PlusAPI usage + SDK is free
Best forDevelopers who want Cursor-like power for less money.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Travel planning, shopping comparisons, deep research where you want an artifact back.Developers building custom agents for their own company/product.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Sparkpages = curated multi-source mini-articles
  • Agent can book, compare, shop
  • Autopilot agent for long tasks
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
Weaknesses
  • Smaller community
  • Model selection more limited
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Early-stage — rough edges
  • Less reliable than Perplexity for simple questions
  • Developer-only
  • You build the UI
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. Bet on this one — the Sparkpage format is genuinely new.S-tier for builders. The right primitives. What Kai is built on under the hood.
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