Compare AI tools

	Aider A	Perplexity S	Claude Code S	Claude S
Tagline	Terminal-based AI pair programmer. Git-aware, model-flexible.	AI search done right. Cited answers, not chat theater.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	Anthropic's flagship — best reasoning + longest useful context.
Category	coding	research	coding	chat
Pricing	Free (open source) + whatever API you use	Free + $20/mo Pro	Part of Claude Pro/Max/Team plans	Free + $20/mo Pro + team/enterprise
Best for	Developers who want open-source tooling with full control.	Replacing Google for any question where you want a cited answer in seconds.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	Long writing, code, careful thinking, documents over 50 pages.
Strengths	Works in any terminal Auto-commits changes with meaningful messages Works with any model (Claude, GPT, local) Minimal learning curve	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Best-in-class writing + nuanced reasoning 1M context on Opus Artifacts for code/docs Lowest hallucination rate in my testing
Weaknesses	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly	Not a general chatbot Answers can be shallow on complex topics	Terminal-based — learning curve Can't be used without Claude subscription	Image generation is weak No native web search on all tiers
Kai's verdict	A-tier. The right answer if you want open-source + terminal-native + model-agnostic.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.
Link	Open →	Open →	Open →	Open →