Anthropic's assistant, known for long-document reasoning, nuanced writing, and coding, with context windows up to 1M tokens on higher tiers.
The only consumer assistant with a real 1M context that works. If you read 200+ page documents, this is the one. Otherwise, ChatGPT's ecosystem wins.
Summarise a 400-page technical document with section-level citations.
Illustrative long-context task; not executed here.



