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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
Gemini
A
OpenAI Voice / Realtime
S
GitHub Copilot
B
TaglineRun any open-source AI model with an API call.Google's answer. Best integrated with Workspace + free for a lot.ChatGPT's voice + the Realtime API for developers.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.
CategoryDev PlatformChatbotsVoiceCoding
PricingPay per second of computeFree + $20/mo Advanced (bundled with 2TB Drive)Voice included with ChatGPT Plus; Realtime API by usageFree (limited) + $10/mo Pro + $19/mo Business
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Anyone already on Google, research tasks, summarizing long documents.Voice chat users, developers building voice agents on OpenAI.Teams with GitHub already. Devs who don't want to change IDEs.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Less agentic than Cursor/Claude Code
  • Model quality varies
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.
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