Compare AI tools

	Claude S	OpenRouter S	Claude Code S	NotebookLM S
Tagline	Anthropic's flagship — best reasoning + longest useful context.	One API, every model. Pay-as-you-go, no subscriptions.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	Google's research notebook. Turns your docs into a podcast.
Category	Chatbots	Dev Platform	Coding	Research
Pricing	Free + $20/mo Pro + team/enterprise	Pay per token — model-dependent	Part of Claude Pro/Max/Team plans	Free
Best for	Long writing, code, careful thinking, documents over 50 pages.	Developers experimenting across models. Apps that want fallback logic.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths	Best-in-class writing + nuanced reasoning 1M context on Opus Artifacts for code/docs Lowest hallucination rate in my testing	300+ models from one endpoint Automatic fallbacks between providers No subscription — just pay what you use	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks	Upload anything, ask questions, get cited answers Audio Overview turns docs into a 10-min podcast Great for studying
Weaknesses	Image generation is weak No native web search on all tiers	Slight markup over direct API Some provider features not exposed	Terminal-based — learning curve Can't be used without Claude subscription	Google-only Can be slow on large corpora
Kai's verdict	S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.	S-tier for model-shopping. I use this for every prototype before committing.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.	S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
Link	Open →	Open →	Open →	Open →