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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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Manus
S
Claude Code
S
OpenAI Voice / Realtime
S
HeyGen
S
TaglineAutonomous AI agent that actually finishes tasks.Anthropic's CLI agent. Opus-powered, operates on your repo directly.ChatGPT's voice + the Realtime API for developers.AI avatar videos. Record once, speak any language.
CategoryAgentsCodingVoiceVideo
PricingFree tier + $39-$199/moPart of Claude Pro/Max/Team plansVoice included with ChatGPT Plus; Realtime API by usageFree + $24-$65/mo
Best forPeople who want to hand off tasks entirely — trip planning, research, spreadsheet building.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Voice chat users, developers building voice agents on OpenAI.Course creators, multilingual marketers, anyone scaling video content.
Strengths
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • 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
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
Weaknesses
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Pricey for production apps
  • Less voice variety than ElevenLabs
  • Platform lock-in
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
Kai's verdictS-tier in the agent category. The first one I'd give to a non-technical friend.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.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.
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