Compare AI tools

	Cursor S	Claude Agent SDK S	ChatGPT Operator B	Devin A
Tagline	VS Code fork that made AI coding actually work.	Anthropic's SDK for building your own agents on Claude.	OpenAI's browser agent. Clicks and types on websites for you.	Cognition Labs' autonomous coding engineer.
Category	Coding	Agents	Agents	Agents
Pricing	Free + $20/mo Pro + $40/mo Business	API usage + SDK is free	Included with ChatGPT Pro $200/mo	$500/mo
Best for	Developers. Non-developers who want to ship working code.	Developers building custom agents for their own company/product.	Power users willing to pay $200/mo for a browser bot.	Engineering teams offloading tickets. Ops/platform work.
Strengths	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	Actually uses websites — fills forms, clicks, checks out Built into ChatGPT Good for repetitive web tasks	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did
Weaknesses	Can feel overwhelming for non-coders Expensive at scale	Developer-only You build the UI	Slow vs doing it yourself Breaks on complex auth flows $200/mo gate	Expensive Best for well-scoped tasks Not for solo hobbyists
Kai's verdict	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.	B-tier. Still early. Manus is more flexible for less money.	A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
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