Claude is a neural network built by the American company Anthropic and one of the main rivals to ChatGPT and Gemini. It works with text: answers questions, writes and edits material, reads documents, programs and reviews other people's code.
Claude is chosen where the answer has to be precise rather than impressive: contracts and financial reports, technical documentation, development and code review, analytics, customer support. The model holds up to a million tokens in context — about 500 thousand words, which means an entire codebase or a folder of documents in one conversation, with nothing cut into pieces. Claude understands images and PDFs: attach a scan, a diagram or a table and ask about it in plain text.
The family has several models for different jobs and budgets: the fast and cheap Haiku, the general-purpose Sonnet, the powerful Opus and Fable for the hardest work. All of them are available in GPTunneL — worldwide, without a VPN, with one balance and billing for the tokens you actually spend.