Compare AI tools

	Elicit S	Cursor S	Claude Agent SDK S	ChatGPT Operator B
Tagline	AI research assistant for academic literature.	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.
Category	Research	Coding	Agents	Agents
Pricing	Free + $12-$42/mo	Free + $20/mo Pro + $40/mo Business	API usage + SDK is free	Included with ChatGPT Pro $200/mo
Best for	Grad students, researchers, anyone doing literature reviews.	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.
Strengths	Searches 125M+ papers Extracts + synthesizes findings across papers Systematic review workflow	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
Weaknesses	Academic-only Can hallucinate citations — verify everything	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
Kai's verdict	S-tier for academic research. Nothing else comes close for systematic reviews.	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.
Link	Open →	Open →	Open →	Open →