If you're not familiar with Claude, it's the family of large-language models made by the AI company Anthropic. And Claude just got a huge upgrade in the form of Claude 4, Anthropic's newest AI model.

Claude Sonnet 4 improves on its predecessor’s capabilities, especially excelling in coding, Anthropic said. ... Claude Code emerges from preview: Now generally available, ...

Powered by Opus 4 and Sonnet 4, Claude Code would allow Anthropic's LLMs to do more because it could write code in order to analyze data.

Claude Sonnet 4, now Anthropic’s default general-purpose model, ... A Claude Code SDK, now on GitHub, can be used to build AI agents. Additionally, ...

Sonnet 4 remains accessible to free users, while Opus 4 requires a paid subscription. The Claude 4 models also debut Claude Code ( introduced in February) as a generally available product after ...

Free users can only access Claude Sonnet 4 for now. In addition to the new models, Anthropic’s Claude Code agentic command-line tool is now generally available following its limited preview in ...

According to Anthropic, Claude Sonnet 4 is a significant upgrade to Claude Sonnet 3.7, offering improved coding and reasoning along with the ability to respond to instructions more precisely.

While Anthropic launched a new flagship AI model earlier this year, Claude Sonnet 3.7, alongside an agentic coding tool called Claude Code, competitors — including OpenAI and Google — have ...

Claude Sonnet 4 is a more affordable and efficiency-focused model that’s better suited to general tasks, which supersedes the 3.7 Sonnet model released in February.