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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
Claude Agent SDK
S
Perplexity
S
Manus
S
DALL-E 3
B
TaglineAnthropic's SDK for building your own agents on Claude.AI search done right. Cited answers, not chat theater.Autonomous AI agent that actually finishes tasks.OpenAI's image model. Built into ChatGPT Plus.
CategoryAgentsResearchAgentsImage
PricingAPI usage + SDK is freeFree + $20/mo ProFree tier + $39-$199/moIncluded with ChatGPT Plus $20/mo
Best forDevelopers building custom agents for their own company/product.Replacing Google for any question where you want a cited answer in seconds.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.ChatGPT Plus users who want images without paying extra.
Strengths
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
Weaknesses
  • Developer-only
  • You build the UI
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
Kai's verdictS-tier for builders. The right primitives. What Kai is built on under the hood.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier in the agent category. The first one I'd give to a non-technical friend.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.
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