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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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Dev Platform
Audio
Research
Agents
Coding
Chatbots
Image
Video
Voice
Meetings
Design
Productivity
Writing
Data
Marketing
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Replicate
S
Cursor
S
Figma AI
A
Claude Agent SDK
S
TaglineRun any open-source AI model with an API call.VS Code fork that made AI coding actually work.AI features baked into the design tool you already use.Anthropic's SDK for building your own agents on Claude.
CategoryDev PlatformCodingDesignAgents
PricingPay per second of computeFree + $20/mo Pro + $40/mo BusinessIncluded with Figma plansAPI usage + SDK is free
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers. Non-developers who want to ship working code.Designers already on Figma.Developers building custom agents for their own company/product.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • First drafts with Make Designs
  • Rename/rearrange layers automatically
  • Natural language asset search
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Features vary by plan + region
  • Still rolling out
  • Developer-only
  • You build the UI
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. No reason not to use it if you're on Figma. Not worth switching for.S-tier for builders. The right primitives. What Kai is built on under the hood.
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