Claude is a family of large language models made by Anthropic. You can chat with it like you would with a colleague, ask it to draft an email, summarise a contract, write code or answer questions about a document you give it. Under the hood it is a large language model, trained on huge amounts of text and tuned to be helpful and safe.
Think of Claude as a very fast, very well-read assistant who has never had a bad day. You hand it a 40-page supplier agreement and a question, and a few seconds later you get a plain-language answer with the relevant clauses pulled out. It does not get tired on page 38, and it will tell you when it is unsure rather than guessing wildly. Like any AI assistant, it works best when you give it clear instructions and the right context.
There are different Claude models for different jobs. Bigger ones reason more deeply for hard problems, smaller ones answer simple questions faster and cheaper. Picking the right size is mostly a trade-off between quality, speed and cost, so a high-volume support flow might use a smaller model while a tricky legal review uses a larger one. Claude can also handle very long inputs, so it can read an entire report at once instead of in fragments. You reach it through the Claude.ai chat app or through Anthropic’s API, which is how it gets built into other products.
At TopDevs we use Claude inside client tools where careful reading and writing matter, like answering questions over a company’s own documents or drafting first-pass content that a human then checks.
