KaiAI tutor for anyone

Compare AI tools

Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
Pick tools (4 selected)
Dev Platform
Audio
Research
Agents
Coding
Chatbots
Image
Video
Voice
Meetings
Design
Productivity
Writing
Data
Marketing
Education
DeepSeek
S
Claude Agent SDK
S
Sora
A
Perplexity
S
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.Anthropic's SDK for building your own agents on Claude.OpenAI's video model. Long clips, cinematic quality.AI search done right. Cited answers, not chat theater.
CategoryChatbotsAgentsVideoResearch
PricingFree web + ultra-cheap API (~$0.14/M input tokens)API usage + SDK is freeIncluded with ChatGPT Plus/ProFree + $20/mo Pro
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.Developers building custom agents for their own company/product.ChatGPT subscribers experimenting with cinematic shots.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Developer-only
  • You build the UI
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.S-tier for builders. The right primitives. What Kai is built on under the hood.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
LinkOpen →Open →Open →Open →