Anthropic’s new Claude 4 AI models can reason over many steps

During its inaugural developer conference Thursday, Anthropic launched two new AI models that the startup claims are among the industry’s best, at least in terms of how they score on popular benchmarks. Claude Opus 4 and Claude Sonnet 4, part of Anthropic’s new family of models, Claude 4, can analyze large data sets, execute long-horizon tasks, and take complex actions, according to the company. Both models were tuned to perform well on programming tasks, Anthropic says, making them well-suited for writing and editing code. Both paying users and users of the company’s free chatbot apps will get access to Sonnet 4 but only paying users will get access to Opus 4. For Anthropic’s API, via Amazon’s Bedrock platform and Google’s Vertex AI, Opus 4 will be priced at $15/$75 per million tokens (input/output) and Sonnet 4 at $3/$15 per million tokens (input/output). Tokens are the raw bits of data that AI models work with, with a million tokens being equivalent to about 750,000 words — rough ... Read full article.