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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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Replicate
S
Grammarly
A
Adobe Firefly
A
Devin
A
TaglineRun any open-source AI model with an API call.Grammar check + tone + AI drafting, everywhere you type.Commercially safe image gen, deeply integrated with Photoshop.Cognition Labs' autonomous coding engineer.
CategoryDev PlatformWritingImageAgents
PricingPay per second of computeFree + $12-$15/mo Premium + team plansFree + included with Creative Cloud$500/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Non-native English writers, business email, anyone who types a lot.Anyone in Creative Cloud. Brands that need copyright clarity.Engineering teams offloading tickets. Ops/platform work.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Trained on licensed content — commercially safe
  • Generative Fill in Photoshop is incredible
  • Native to Adobe ecosystem
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Aesthetic ceiling below Midjourney
  • Tied to Adobe subscription
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.S-tier inside Photoshop (Generative Fill). B-tier standalone.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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