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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
Elicit
S
Grok
A
HeyGen
S
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.AI research assistant for academic literature.xAI's chatbot. Real-time X/Twitter data + fewer refusals.AI avatar videos. Record once, speak any language.
CategoryChatbotsResearchChatbotsVideo
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Free + $12-$42/moFree + $30/mo SuperGrok + included with X PremiumFree + $24-$65/mo
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.Grad students, researchers, anyone doing literature reviews.Breaking news, live event tracking, users already on X.Course creators, multilingual marketers, anyone scaling video content.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
  • Live access to X posts for real-time events
  • Less restrictive on edgy questions
  • Fast inference on Grok-3 and up
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Academic-only
  • Can hallucinate citations — verify everything
  • Writing quality trails Claude/ChatGPT
  • Political bias debates
  • Ecosystem is just X
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.S-tier for academic research. Nothing else comes close for systematic reviews.A-tier for real-time. B-tier for everything else. Worth checking when news breaks.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.
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