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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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Aider
A
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TaglineTerminal-based AI pair programmer. Git-aware, model-flexible.OpenAI's browser agent. Clicks and types on websites for you.Vector + raster AI for designers. Actually controls the output.Run any open-source AI model with an API call.
CategoryCodingAgentsImageDev Platform
PricingFree (open source) + whatever API you useIncluded with ChatGPT Pro $200/moFree + $12-$48/moPay per second of compute
Best forDevelopers who want open-source tooling with full control.Power users willing to pay $200/mo for a browser bot.Designers, brand teams, anyone needing vector output or tight style control.Developers using open-source models (Flux, SDXL, Whisper, etc).
Strengths
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Exports SVG vectors — rare in AI image gen
  • Strong style control + consistency
  • Brand kit for consistent outputs
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
Weaknesses
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Less hyped than Midjourney
  • Learning curve for non-designers
  • Cold starts on less-popular models
  • Pricing gets real at scale
Kai's verdictA-tier. The right answer if you want open-source + terminal-native + model-agnostic.B-tier. Still early. Manus is more flexible for less money.S-tier for designers. The only one that takes vectors seriously.S-tier for open-source model APIs. The default in this space.
LinkOpen →Open →Open →Open →