Claude

Claude is Anthropic's family of AI assistants, available as a chat product at claude.ai, an API for developers, and a coding agent called Claude Code. The flagship model line includes Opus, Sonnet, and Haiku, each tuned for a different mix of capability, speed, and cost. Claude is widely used for writing, analysis, coding, and long context reasoning.

The product traces back to Anthropic's research on safety and steerability. Claude is the public surface for that work, and it shows up in features like Constitutional AI training, careful refusals, and detailed system prompt support. Claude has become one of the two or three default options for serious AI workflows.

What Claude actually does

The chat product is the simplest entry. You talk to Claude in a browser or mobile app, attach files, share images, and get answers grounded in the conversation. Projects organize related chats, system prompts, and reference files in a single workspace.

The API exposes the same models for developers. You can build assistants, summarizers, coding helpers, agentic workflows, and search-augmented apps on top. The Anthropic SDK supports streaming, tool use, prompt caching, and a managed agents service.

Who Claude is built for

Claude is built for anyone serious about AI assistance. Writers use it to draft and edit, analysts feed it long reports, and developers wire it into product features. The chat product fits curious individuals, while the API targets teams shipping software.

Coding teams have adopted Claude heavily through Claude Code, the terminal agent. Founders use Claude for research, market notes, and content drafts. Designers prompt Claude for copy, and operators use it for ticket triage.

Claude pricing

The Claude chat product has a free tier with daily limits and paid Pro and Team plans. Pro adds higher usage, larger projects, and access to top models. Team adds shared workspaces and admin controls.

The API is pay as you go, priced per million input and output tokens. Prompt caching can cut repeat-prompt costs significantly. Heavy users sit on enterprise contracts with dedicated capacity.

Features that define Claude

Long context is a marquee feature. Claude can read whole books, large codebases, and stacks of PDFs in a single prompt. That's a real difference when summarizing or refactoring.

Tool use lets Claude call functions, run code, and orchestrate workflows. Agents can search files, browse, and operate on data. The combination unlocks autonomous coding sessions and research bots.

Projects in claude.ai keep ongoing work organized. You upload reference files, set a system prompt, and start chats that all share the same context. Artifacts render code, charts, and rich previews inline.

Tradeoffs and rough edges

Claude refuses some requests that other models accept. Anthropic leans cautious, which is great for safety and frustrating when you want a more direct answer. The behavior can be tuned with system prompts and model choice.

The product surface is smaller than some competitors. There's no native image generation in chat, and integrations are growing but still trail OpenAI's plugin and GPT store ecosystem.

Claude vs alternatives

The most common comparisons are Claude versus ChatGPT, Gemini, and open models like Llama. ChatGPT has a wider feature set in the consumer app, including image generation and a custom GPT store. Gemini ties into Google Workspace tightly. Open models give you full control but no managed product.

Claude's reputation is strongest in writing quality and large context coding. See Claude vs ChatGPT and the best AI coding tools for context.

Common questions about Claude

Is Claude better than ChatGPT for coding? Many engineers say yes, especially for long files. The honest answer is that they trade leads on specific benchmarks.

Can Claude browse the web? It can with web search enabled in the chat product. The API supports tool use that you can wire to a search backend.

Does Claude train on my data? Anthropic's policy is that API and Team data isn't used to train by default. Check the latest privacy page for the exact terms.

Bottom line on Claude

Claude is one of the best AI assistants available, with a strong focus on writing quality, long context, and safety. It's a great choice for teams shipping serious AI features. Browse Claude alternatives if you want a side by side.

Try the free tier on a real task you struggle with, then decide. Explore tools for developers for adjacent options.

Claude Code and developer workflows

Claude Code is Anthropic's terminal coding agent. You run a command, ask Claude to add a feature, and it edits files, runs tests, and reports back. It works on real codebases and has become a popular daily driver for engineers.

The combination of long context and careful tool use makes Claude strong on multi-file refactors. You can give it a whole repo and ask for changes that touch a dozen files. The agent often gets surprisingly close to a clean PR.

Best practices for prompting Claude

Use system prompts to set the role and constraints. Claude follows system instructions tightly. State the expected output format, the audience, and the things to avoid.

For long context, put the most important content closest to the question. Claude reads everything but pays the most attention to recent tokens. Prompt caching can lower the cost on repeat workflows significantly.