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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
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Manus
S
DALL-E 3
B
Claude Code
S
OpenAI Voice / Realtime
S
TaglineAutonomous AI agent that actually finishes tasks.OpenAI's image model. Built into ChatGPT Plus.Anthropic's CLI agent. Opus-powered, operates on your repo directly.ChatGPT's voice + the Realtime API for developers.
CategoryAgentsImageCodingVoice
PricingFree tier + $39-$199/moIncluded with ChatGPT Plus $20/moPart of Claude Pro/Max/Team plansVoice included with ChatGPT Plus; Realtime API by usage
Best forPeople who want to hand off tasks entirely — trip planning, research, spreadsheet building.ChatGPT Plus users who want images without paying extra.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Voice chat users, developers building voice agents on OpenAI.
Strengths
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Advanced Voice Mode feels genuinely conversational
  • Realtime API enables true two-way voice apps
  • Built into ChatGPT
Weaknesses
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
Kai's verdictS-tier in the agent category. The first one I'd give to a non-technical friend.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier for conversation. A-tier for TTS. Complement to ElevenLabs, not replacement.
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