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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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DeepSeek
S
DALL-E 3
B
Cursor
S
Claude Agent SDK
S
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.OpenAI's image model. Built into ChatGPT Plus.VS Code fork that made AI coding actually work.Anthropic's SDK for building your own agents on Claude.
CategoryChatbotsImageCodingAgents
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Included with ChatGPT Plus $20/moFree + $20/mo Pro + $40/mo BusinessAPI usage + SDK is free
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.ChatGPT Plus users who want images without paying extra.Developers. Non-developers who want to ship working code.Developers building custom agents for their own company/product.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Excellent prompt understanding
  • Built into ChatGPT — no extra subscription
  • Good at composition + concepts
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Production-grade agent primitives
  • Built on Claude (best reasoning)
  • Full control — build exactly what you need
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Aesthetic ceiling below Midjourney + Ideogram
  • Text rendering worse than Ideogram
  • No fine control
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Developer-only
  • You build the UI
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.B-tier standalone, A-tier value if you already pay ChatGPT. Don't pay for it separately.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for builders. The right primitives. What Kai is built on under the hood.
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