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)
Chatbots
Research
Coding
Image
Video
Voice
Meetings
Design
Productivity
Audio
Writing
Agents
Dev Platform
Data
Marketing
Education
DeepSeek
S
ChatGPT
S
Rows
A
Lex
A
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.The default. Strongest ecosystem + best multimodal breadth.Spreadsheets with AI + live integrations baked in.Google Docs with an AI collaborator baked in.
CategoryChatbotsChatbotsDataWriting
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Free + $20/mo Plus + $200/mo ProFree + $19-$89/user/moFree + $12/mo
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.General use, voice chat, image generation, first-time AI users.Ops teams, marketers, anyone building dashboards from multiple sources.Essays, long-form drafts, thinking on the page.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Great voice mode
  • Huge plugin/custom GPT ecosystem
  • Strong image generation (DALL-E built in)
  • Code Interpreter
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Reasoning quality varies by mode
  • Can be verbose
  • Confabulates on niche facts
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.S-tier all-rounder. If you want one tool that does everything okay-to-great, this is it.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
LinkOpen →Open →Open →Open →