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Claude is Anthropic's AI assistant, known for nuanced writing, long-context reasoning (200k tokens), and strong safety. UK professionals use Claude for drafting, analysis, and coding — many find its writing quality and instruction-following superior to rivals. Free tier available; Pro is $20/month, with API access priced per token. Claude supports projects, artifacts, and team plans. GDPR compliance with data processing terms, including options to keep data out of model training. It's the leading alternative to ChatGPT for UK teams that prioritise writing quality and reasoning.