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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
Agents
Voice
Video
Audio
Research
Coding
Chatbots
Image
Meetings
Design
Productivity
Writing
Data
Marketing
Education
Windsurf
A
Claude Agent SDK
S
Cursor
S
Manus
S
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Anthropic's SDK for building your own agents on Claude.VS Code fork that made AI coding actually work.Autonomous AI agent that actually finishes tasks.
CategoryCodingAgentsCodingAgents
PricingFree + $15/mo ProAPI usage + SDK is freeFree + $20/mo Pro + $40/mo BusinessFree tier + $39-$199/mo
Best forDevelopers who want Cursor-like power for less money.Developers building custom agents for their own company/product.Developers. Non-developers who want to ship working code.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Smaller community
  • Model selection more limited
  • Developer-only
  • You build the UI
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.S-tier for builders. The right primitives. What Kai is built on under the hood.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier in the agent category. The first one I'd give to a non-technical friend.
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