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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
Suno
S
Sora
A
TaglineRun any open-source AI model with an API call.Meeting notes, free forever for individuals.Prompt to full song with vocals, instruments, the works.OpenAI's video model. Long clips, cinematic quality.
CategoryDev PlatformMeetingsAudioVideo
PricingPay per second of computeFree for individuals + $15-$29/user/mo teamsFree + $10/mo + $30/moIncluded with ChatGPT Plus/Pro
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Solo operators, freelancers, small teams on a budget.Jingles, intros, demos, sketches, personal use.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
  • Real songs with real lyrics
  • v4 is very good
  • Quick turnaround
  • 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
  • Copyright gray zone
  • Audio quality behind studio
  • 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 its category. The first AI music tool I'd actually listen to.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
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