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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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Dev Platform
Agents
Voice
Video
Audio
Research
Coding
Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
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Replicate
S
Fireflies
A
OpenAI Voice / Realtime
S
DALL-E 3
B
TaglineRun any open-source AI model with an API call.Sales-focused meeting AI with CRM integration.ChatGPT's voice + the Realtime API for developers.OpenAI's image model. Built into ChatGPT Plus.
CategoryDev PlatformMeetingsVoiceImage
PricingPay per second of computeFree + $10-$19/user/moVoice included with ChatGPT Plus; Realtime API by usageIncluded with ChatGPT Plus $20/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Sales teams, customer success, anyone running many discovery calls.Voice chat users, developers building voice agents on OpenAI.ChatGPT Plus users who want images without paying extra.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier for sales teams. B-tier for solo users.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.
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