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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
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Productivity
Writing
Data
Marketing
Education
Gemini
A
DALL-E 3
B
v0
S
Writesonic
B
TaglineGoogle's answer. Best integrated with Workspace + free for a lot.OpenAI's image model. Built into ChatGPT Plus.Vercel's AI-powered UI generator. Prompt to shadcn component.SEO-first AI writer. Optimized for ranking content.
CategoryChatbotsImageDesignMarketing
PricingFree + $20/mo Advanced (bundled with 2TB Drive)Included with ChatGPT Plus $20/moFree + $20/moFree + $15-$99/mo
Best forAnyone already on Google, research tasks, summarizing long documents.ChatGPT Plus users who want images without paying extra.Frontend devs, PMs prototyping UIs, anyone on Next.js.Content marketers churning out SEO articles.
Strengths
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
  • SEO built-in (Surfer integration)
  • Article generator for long-form
  • Chatsonic for research
Weaknesses
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Best for shadcn stack
  • Iterating can be fiddly
  • Output quality behind Claude for polish
  • SEO automation can produce generic content
Kai's verdictA-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.S-tier. If you're on Vercel/shadcn, this is cheating.B-tier. Use Claude + manual SEO thinking. Writesonic is fast but generic.
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