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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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DeepSeek
S
Sora
A
ChatGPT Operator
B
Claude Agent SDK
S
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.OpenAI's video model. Long clips, cinematic quality.OpenAI's browser agent. Clicks and types on websites for you.Anthropic's SDK for building your own agents on Claude.
CategoryChatbotsVideoAgentsAgents
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Included with ChatGPT Plus/ProIncluded with ChatGPT Pro $200/moAPI usage + SDK is free
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.ChatGPT subscribers experimenting with cinematic shots.Power users willing to pay $200/mo for a browser bot.Developers building custom agents for their own company/product.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Developer-only
  • You build the UI
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.B-tier. Still early. Manus is more flexible for less money.S-tier for builders. The right primitives. What Kai is built on under the hood.
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