Compare AI tools

	Claude Code S	ChatGPT Operator B	Perplexity S	Claude Agent SDK S
Tagline	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	OpenAI's browser agent. Clicks and types on websites for you.	AI search done right. Cited answers, not chat theater.	Anthropic's SDK for building your own agents on Claude.
Category	coding	agents	research	agents
Pricing	Part of Claude Pro/Max/Team plans	Included with ChatGPT Pro $200/mo	Free + $20/mo Pro	API usage + SDK is free
Best for	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	Power users willing to pay $200/mo for a browser bot.	Replacing Google for any question where you want a cited answer in seconds.	Developers building custom agents for their own company/product.
Strengths	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Production-grade agent primitives Built on Claude (best reasoning) Full control — build exactly what you need
Weaknesses	Terminal-based — learning curve Can't be used without Claude subscription	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate	Not a general chatbot Answers can be shallow on complex topics	Developer-only You build the UI
Kai's verdict	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	B-tier. Still early. Manus is more flexible for less money.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	S-tier for builders. The right primitives. What Kai is built on under the hood.
Link	Open →	Open →	Open →	Open →