To understand the significance of someone running a marathon in less than two hours, you also need to understand that, until recently, the notion of this actually happening was truly, utterly absurd.
Now the same model can behave very differently depending on what harness it's operating in. Claude Opus 4.6 talking to you in a chat window is a very different experience from Claude Opus 4.6 operating inside Claude Code, autonomously writing and testing software for hours at a stretch.
2mo ago
Underscored — save the words that stop you in your tracks.
