Claude Opus 5

The read

Opus 5 is the model that makes the rest of Anthropic's line-up hard to justify. It gives up a little at the very top of the reasoning range and takes half off the bill, while staying quick enough to sit inside an editor or an agent loop. If you are choosing one paid frontier model and do not want to think about it again this quarter, this is the honest answer.

Where it shines

• Frontier-class output without the flagship's price
• Fast enough for interactive use, unlike the tier above it
• Excellent at long-context reading of an existing codebase

Worth knowing first

• Still priced well above the open-weights models that trail it narrowly
• No free tier, so there is no cheap way to evaluate it at volume