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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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S
Claude
S
DALL-E 3
B
Hume AI
A
TaglineRun any open-source AI model with an API call.Anthropic's flagship — best reasoning + longest useful context.OpenAI's image model. Built into ChatGPT Plus.Voice AI that reads + expresses emotion.
CategoryDev PlatformChatbotsImageVoice
PricingPay per second of computeFree + $20/mo Pro + team/enterpriseIncluded with ChatGPT Plus $20/moFree tier + pay-as-you-go
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Long writing, code, careful thinking, documents over 50 pages.ChatGPT Plus users who want images without paying extra.Therapy apps, customer service, any voice agent where emotion matters.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Image generation is weak
  • No native web search on all tiers
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Niche use case
  • Pricing ramps fast
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.A-tier in its niche. The only one that actually gets emotion right.
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