Anthropic Releases Claude Opus 4.6

We were expecting a Claude Sonnet 5.0 release this week, but Anthropic delivered Claude Opus 4.6 instead, the latest version of its smartest AI model.

“The new Claude Opus 4.6 improves on its predecessor’s coding skills,” Anthropic explains. “It plans more carefully, sustains agentic tasks for longer, can operate more reliably in larger codebases, and has better code review and debugging skills to catch its own mistakes. And, in a first for our Opus-class models, Opus 4.6 features a 1 [million] token context window in beta.”

Claude Opus 4.6 isn’t just about coding: Anthropic says that this new model is also adept at handling everyday work tasks like running financial analyses, doing research, and using and creating documents. It can multitask in Cowork autonomously as well. Tied to this, Anthropic also updated Claude in Microsoft Excel and has released Claude in PowerPoint in a research preview.

“We build Claude with Claude,” Anthropic says. “Our engineers write code with Claude Code every day, and every new model first gets tested on our own work. With Opus 4.6, we’ve found that the model brings more focus to the most challenging parts of a task without being told to, moves quickly through the more straightforward parts, handles ambiguous problems with better judgment, and stays productive over longer sessions.”

Anthropic also revealed that it now has over 300,000 paying business customers.