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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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GitHub Copilot
B
Claude
S
Perplexity
S
OpenAI Voice / Realtime
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Anthropic's flagship — best reasoning + longest useful context.AI search done right. Cited answers, not chat theater.ChatGPT's voice + the Realtime API for developers.
CategoryCodingChatbotsResearchVoice
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20/mo Pro + team/enterpriseFree + $20/mo ProVoice included with ChatGPT Plus; Realtime API by usage
Best forTeams with GitHub already. Devs who don't want to change IDEs.Long writing, code, careful thinking, documents over 50 pages.Replacing Google for any question where you want a cited answer in seconds.Voice chat users, developers building voice agents on OpenAI.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Image generation is weak
  • No native web search on all tiers
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.
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