Claude Sonnet 4.5

“And I'm curious to see if this actually enables everyday people to start using AI coding models more, or if it just makes a developer's life easier. I lean towards the latter.”

“So, 4.5 sine 4.5 basically outdoes Opus, our largest model in effectively every category, but does so while running faster and at a fifth the cost. So if you think about where we were in May at, you know, code with Claude, we were announcing, announcing Opus f…”

“We had one customer had it work for 30 hours. Of course, that's not going to be every task, but like, that's the kind of upper bound that we're starting to see.”

“I think if I pointed at something between Sonnet four and four or five, a lot of it really has been on the engineering side to just be able to scale up especially a lot of the post-training work.”

“We asked every Claude from Claude one to Claude, you know, 4.5 to recreate Claude.ai. So like our flagship AI products. And 4.5 was really the first one that was able to do it end to end and actually produce something of, you know, quality. It actually works. …”