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Devin
A
Fathom
S
ChatGPT Operator
B
TaglineRun any open-source AI model with an API call.Cognition Labs' autonomous coding engineer.Meeting notes, free forever for individuals.OpenAI's browser agent. Clicks and types on websites for you.
Categorydev platformagentsmeetingagents
PricingPay per second of compute$500/moFree for individuals + $15-$29/user/mo teamsIncluded with ChatGPT Pro $200/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Engineering teams offloading tickets. Ops/platform work.Solo operators, freelancers, small teams on a budget.Power users willing to pay $200/mo for a browser bot.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Bot-joining model
  • Team features gated
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.S-tier for solo + free. The best free option, hands down.B-tier. Still early. Manus is more flexible for less money.
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