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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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Claude Agent SDK
S
Claude Code
S
Bolt.new (StackBlitz)
A
Sora
A
TaglineAnthropic's SDK for building your own agents on Claude.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Prompt to deployed full-stack app in the browser.OpenAI's video model. Long clips, cinematic quality.
CategoryAgentsCodingCodingVideo
PricingAPI usage + SDK is freePart of Claude Pro/Max/Team plansFree + $20-$200/moIncluded with ChatGPT Plus/Pro
Best forDevelopers building custom agents for their own company/product.Developers who want an agent, not autocomplete. Large refactors, tests, docs.PMs, founders, non-devs shipping MVPs.ChatGPT subscribers experimenting with cinematic shots.
Strengths
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
Weaknesses
  • Developer-only
  • You build the UI
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
Kai's verdictS-tier for builders. The right primitives. What Kai is built on under the hood.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier. Best for fast prototypes. Competitive with Lovable — try both.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
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