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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
Sora
A
Windsurf
A
TaglineRun any open-source AI model with an API call.Meeting notes, free forever for individuals.OpenAI's video model. Long clips, cinematic quality.Codeium's agentic IDE. Cascade agent + strong free tier.
CategoryDev PlatformMeetingsVideoCoding
PricingPay per second of computeFree for individuals + $15-$29/user/mo teamsIncluded with ChatGPT Plus/ProFree + $15/mo Pro
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Solo operators, freelancers, small teams on a budget.ChatGPT subscribers experimenting with cinematic shots.Developers who want Cursor-like power for less money.
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
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Bot-joining model
  • Team features gated
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Smaller community
  • Model selection more limited
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.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.A-tier. Close second to Cursor. If $5/mo matters, start here.
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