Compare AI tools

	Aider A	Claude Code S	Grok A	Perplexity S
Tagline	Terminal-based AI pair programmer. Git-aware, model-flexible.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	xAI's chatbot. Real-time X/Twitter data + fewer refusals.	AI search done right. Cited answers, not chat theater.
Category	coding	coding	chat	research
Pricing	Free (open source) + whatever API you use	Part of Claude Pro/Max/Team plans	Free + $30/mo SuperGrok + included with X Premium	Free + $20/mo Pro
Best for	Developers who want open-source tooling with full control.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	Breaking news, live event tracking, users already on X.	Replacing Google for any question where you want a cited answer in seconds.
Strengths	Works in any terminal Auto-commits changes with meaningful messages Works with any model (Claude, GPT, local) Minimal learning curve	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Live access to X posts for real-time events Less restrictive on edgy questions Fast inference on Grok-3 and up	Sources every claim Fast, current answers Pro Search runs multi-step research Spaces for persistent context
Weaknesses	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly	Terminal-based — learning curve Can't be used without Claude subscription	Writing quality trails Claude/ChatGPT Political bias debates Ecosystem is just X	Not a general chatbot Answers can be shallow on complex topics
Kai's verdict	A-tier. The right answer if you want open-source + terminal-native + model-agnostic.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	A-tier for real-time. B-tier for everything else. Worth checking when news breaks.	S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.
Link	Open →	Open →	Open →	Open →