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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
Claude Code
S
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.Anthropic's CLI agent. Opus-powered, operates on your repo directly.
CategoryDev PlatformChatbotsVoiceCoding
PricingPay per second of computeFree + $20/mo Advanced (bundled with 2TB Drive)Voice included with ChatGPT Plus; Realtime API by usagePart of Claude Pro/Max/Team plans
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.Developers who want an agent, not autocomplete. Large refactors, tests, docs.
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
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
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
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
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.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.
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