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Claude Code
S
Claude Agent SDK
S
Bolt.new (StackBlitz)
A
TaglineAnthropic's CLI agent. Opus-powered, operates on your repo directly.Anthropic's SDK for building your own agents on Claude.Prompt to deployed full-stack app in the browser.
Categorycodingagentscoding
PricingPart of Claude Pro/Max/Team plansAPI usage + SDK is freeFree + $20-$200/mo
Best forDevelopers who want an agent, not autocomplete. Large refactors, tests, docs.Developers building custom agents for their own company/product.PMs, founders, non-devs shipping MVPs.
Strengths
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
Weaknesses
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Developer-only
  • You build the UI
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
Kai's verdictS-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier for builders. The right primitives. What Kai is built on under the hood.A-tier. Best for fast prototypes. Competitive with Lovable — try both.
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