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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
DALL-E 3
B
OpenAI Voice / Realtime
S
Gemini
A
TaglineRun any open-source AI model with an API call.OpenAI's image model. Built into ChatGPT Plus.ChatGPT's voice + the Realtime API for developers.Google's answer. Best integrated with Workspace + free for a lot.
CategoryDev PlatformImageVoiceChatbots
PricingPay per second of computeIncluded with ChatGPT Plus $20/moVoice included with ChatGPT Plus; Realtime API by usageFree + $20/mo Advanced (bundled with 2TB Drive)
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).ChatGPT Plus users who want images without paying extra.Voice chat users, developers building voice agents on OpenAI.Anyone already on Google, research tasks, summarizing long documents.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
Kai's verdictS-tier for open-source model APIs. The default in this space.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.
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