Anthropic:

Anthropic releases Claude Opus 4.1 to paid Claude users, in Claude Code, via its API, and more, featuring broad improvements over Opus 4 for the same cost  —  Today we're releasing Claude Opus 4.1, an upgrade to Claude Opus 4 on agentic tasks, real-world coding, and reasoning.

Anthropic:

Anthropic releases Claude Opus 4.1 to paid Claude users, in Claude Code, via its API, and more, featuring broad improvements over Opus 4 for the same cost  —  Today we're releasing Claude Opus 4.1, an upgrade to Claude Opus 4 on agentic tasks, real-world coding, and reasoning.

Source: TechMeme
Source Link: http://www.techmeme.com/250805/p31#a250805p31