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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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Flux (Black Forest Labs)
A
Rows
A
Fathom
S
OpenRouter
S
TaglineOpen weights + strong photorealism. The open-source answer.Spreadsheets with AI + live integrations baked in.Meeting notes, free forever for individuals.One API, every model. Pay-as-you-go, no subscriptions.
CategoryImageDataMeetingsDev Platform
PricingAPI + open weights (Schnell is Apache 2.0)Free + $19-$89/user/moFree for individuals + $15-$29/user/mo teamsPay per token — model-dependent
Best forDevelopers + power users who want control and privacy.Ops teams, marketers, anyone building dashboards from multiple sources.Solo operators, freelancers, small teams on a budget.Developers experimenting across models. Apps that want fallback logic.
Strengths
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Unlimited free tier for solo use
  • Strong summaries + action items
  • Works in Zoom, Meet, Teams
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
Weaknesses
  • Harder to use than hosted tools
  • Needs infra
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Bot-joining model
  • Team features gated
  • Slight markup over direct API
  • Some provider features not exposed
Kai's verdictA-tier. S-tier if you self-host. The reason open-source image gen matters.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier for solo + free. The best free option, hands down.S-tier for model-shopping. I use this for every prototype before committing.
LinkOpen →Open →Open →Open →