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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
Cursor
S
Sora
A
DALL-E 3
B
TaglineAnthropic's SDK for building your own agents on Claude.VS Code fork that made AI coding actually work.OpenAI's video model. Long clips, cinematic quality.OpenAI's image model. Built into ChatGPT Plus.
CategoryAgentsCodingVideoImage
PricingAPI usage + SDK is freeFree + $20/mo Pro + $40/mo BusinessIncluded with ChatGPT Plus/ProIncluded with ChatGPT Plus $20/mo
Best forDevelopers building custom agents for their own company/product.Developers. Non-developers who want to ship working code.ChatGPT subscribers experimenting with cinematic shots.ChatGPT Plus users who want images without paying extra.
Strengths
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
Weaknesses
  • Developer-only
  • You build the UI
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
Kai's verdictS-tier for builders. The right primitives. What Kai is built on under the hood.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.
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