Sonnet 5.5

Anthropic is an AI research and deployment company founded by former OpenAI researchers (including Dario Amodei). It develops large language models such as Claude and focuses on AI safety research and commercial model deployments.

Claude 5.1 is described in the supplied video evidence as an Anthropic AI model for programming, scientific research, and agentic tasks. The video claims that it can work continuously for dozens of hours on codebases and multistep research, with separate lower pricing for cached, ordinary, and complex agent tasks.

Claude Sonnet 4 is a large language model developed by Anthropic for generating and analyzing text and code. It can be used for software-development tasks, including turning structured task lists into website implementations.

Anthropic API is the cloud API provided by Anthropic, the AI research company, offering programmatic access to its Claude family of large language models for text generation, chat, and reasoning. The API is intended for developers to integrate Anthropic's models into applications and services.

Claude Code is Anthropic's agentic coding tool for the terminal, IDEs, and GitHub. It uses natural-language commands to understand a codebase, create and read files, execute commands, run tests, explain code, manage Git workflows, and handle routine development tasks. It can also load persistent project context, run custom slash commands, use plugins with custom commands and agents, and operate with configurable autonomy while leaving actions such as final pull-request merging to a human. The official repository documents installation for macOS, Linux, and Windows, and identifies npm installation as deprecated.