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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
Education
Devin
A
Manus
S
Windsurf
A
Flux (Black Forest Labs)
A
TaglineCognition Labs' autonomous coding engineer.Autonomous AI agent that actually finishes tasks.Codeium's agentic IDE. Cascade agent + strong free tier.Open weights + strong photorealism. The open-source answer.
CategoryAgentsAgentsCodingImage
Pricing$500/moFree tier + $39-$199/moFree + $15/mo ProAPI + open weights (Schnell is Apache 2.0)
Best forEngineering teams offloading tickets. Ops/platform work.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.Developers who want Cursor-like power for less money.Developers + power users who want control and privacy.
Strengths
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
Weaknesses
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Smaller community
  • Model selection more limited
  • Harder to use than hosted tools
  • Needs infra
Kai's verdictA-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier in the agent category. The first one I'd give to a non-technical friend.A-tier. Close second to Cursor. If $5/mo matters, start here.A-tier. S-tier if you self-host. The reason open-source image gen matters.
LinkOpen →Open →Open →Open →