Claude 4

// about Claude 4

Claude 4 is Anthropic's latest generation of large language models, with Opus 4.7 as the most capable, Sonnet 4.6 as the balanced workhorse, and Haiku 4.5 as the fastest and most affordable. All models feature a 200k-token context window, strong coding and reasoning ability, and Constitutional AI safety training. Developers access the family via the Anthropic API to build everything from document-analysis pipelines to fully autonomous coding agents.