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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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S
Fathom
S
Manus
S
Sora
A
TaglineRun any open-source AI model with an API call.Meeting notes, free forever for individuals.Autonomous AI agent that actually finishes tasks.OpenAI's video model. Long clips, cinematic quality.
CategoryDev PlatformMeetingsAgentsVideo
PricingPay per second of computeFree for individuals + $15-$29/user/mo teamsFree tier + $39-$199/moIncluded with ChatGPT Plus/Pro
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Solo operators, freelancers, small teams on a budget.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.ChatGPT subscribers experimenting with cinematic shots.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Bot-joining model
  • Team features gated
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for solo + free. The best free option, hands down.S-tier in the agent category. The first one I'd give to a non-technical friend.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
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