Compare AI tools

	Cursor S	Claude Code S	Cline A	Claude Agent SDK S
Tagline	VS Code fork that made AI coding actually work.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	Open-source VS Code agent. Reads + writes + runs.	Anthropic's SDK for building your own agents on Claude.
Category	coding	coding	coding	agents
Pricing	Free + $20/mo Pro + $40/mo Business	Part of Claude Pro/Max/Team plans	Free (open source) + your API costs	API usage + SDK is free
Best for	Developers. Non-developers who want to ship working code.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	VS Code users who want agentic coding without changing IDEs.	Developers building custom agents for their own company/product.
Strengths	Tab completion feels like mind-reading Composer for multi-file edits Runs Claude, GPT, Gemini — you pick	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Free extension for VS Code Plan + Act modes Model-agnostic (Claude, GPT, local) Sees terminal output and iterates	Production-grade agent primitives Built on Claude (best reasoning) Full control — build exactly what you need
Weaknesses	Can feel overwhelming for non-coders Expensive at scale	Terminal-based — learning curve Can't be used without Claude subscription	Can burn tokens fast if not watched Less polished than Cursor	Developer-only You build the UI
Kai's verdict	S-tier for coding. If you write code of any kind, this pays back the $20 in a day.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	A-tier. Best free agentic option in VS Code. Use with Claude for best results.	S-tier for builders. The right primitives. What Kai is built on under the hood.
Link	Open →	Open →	Open →	Open →