Also: Anthropic's free Claude 4 Sonnet aced my coding tests - but its paid Opus model somehow didn't ...

In particular, that marathon refactoring claim reportedly comes from Rakuten, a Japanese tech services conglomerate that "validated [Claude's] capabilities with a demanding open-source refactor ...

Anthropic says Claude Opus 4 is its most powerful model and the best coding model in the world, while Sonnet 4 is replacing Sonnet 3.7 in the chatbot.

Contextual Persistence: Higher-agency systems maintain awareness of project goals across multiple interactions. While code ...

Anthropic’s latest AI model, Claude Opus 4, has surpassed OpenAI’s GPT-4.1 in coding abilities, marking a significant shift ...

Anthropic's Claude Opus 4 outperforms OpenAI's GPT-4.1 with unprecedented seven-hour autonomous coding sessions and record-breaking 72.5% SWE-bench score, transforming AI from quick-response tool to ...

Anthropic kicked off its first-ever Code with Claude conference today with the announcement of a new frontier AI system. The company is calling Claude Opus 4 the best coding model in the world.

Anthropic's newest editon of its flagship AI product will address significant limitations in current large language models.

Claude Opus 4 is Anthropic’s most powerful AI model to date, according to the company’s announcement, and capable of working ...

Claude 4 Opus is specifically designed to handle high-performance, long-duration tasks. It excels in advanced reasoning, memory retention, and multifile code comprehension, making it a robust ...

Anthropic’s Claude Opus 4 exhibited simulated blackmail in stress tests, prompting safety scrutiny despite also showing a ...

Claude Opus 4 and Claude Sonnet 4, which aim to support a wider range of professional and academic tasks beyond code generation. According to Anthropic, Claude Opus 4 is optimized for extended ...