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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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research
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Windsurf
A
Flux (Black Forest Labs)
A
GitHub Copilot
B
NotebookLM
S
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Open weights + strong photorealism. The open-source answer.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Google's research notebook. Turns your docs into a podcast.
Categorycodingimagecodingresearch
PricingFree + $15/mo ProAPI + open weights (Schnell is Apache 2.0)Free (limited) + $10/mo Pro + $19/mo BusinessFree
Best forDevelopers who want Cursor-like power for less money.Developers + power users who want control and privacy.Teams with GitHub already. Devs who don't want to change IDEs.Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Runs locally on a beefy GPU
  • Very photoreal
  • Best open-weight model
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
Weaknesses
  • Smaller community
  • Model selection more limited
  • Harder to use than hosted tools
  • Needs infra
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Google-only
  • Can be slow on large corpora
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.A-tier. S-tier if you self-host. The reason open-source image gen matters.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
LinkOpen →Open →Open →Open →