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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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Devin
A
Flux (Black Forest Labs)
A
Manus
S
Perplexity
S
TaglineCognition Labs' autonomous coding engineer.Open weights + strong photorealism. The open-source answer.Autonomous AI agent that actually finishes tasks.AI search done right. Cited answers, not chat theater.
CategoryAgentsImageAgentsResearch
Pricing$500/moAPI + open weights (Schnell is Apache 2.0)Free tier + $39-$199/moFree + $20/mo Pro
Best forEngineering teams offloading tickets. Ops/platform work.Developers + power users who want control and privacy.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.Replacing Google for any question where you want a cited answer in seconds.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Harder to use than hosted tools
  • Needs infra
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Not a general chatbot
  • Answers can be shallow on complex topics
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. S-tier if you self-host. The reason open-source image gen matters.S-tier in the agent category. The first one I'd give to a non-technical friend.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
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