Claude Opus 5

What problem it solves

This listing is Anthropic's Opus 5 row in the directory: a proprietary model aimed at hard coding and long tasks, with a large claimed context window. You open it when you want that specific hosted model, not "whatever Anthropic currently calls newest."

Who it is for

People allowed to send the prompt to Anthropic, who want one pinned name in a design note or an API config. Fast and batch rows are pricing and endpoint variants. Use this row when you mean the standard Opus 5 call. The closed-source category intro explains why variants should not be mixed in a comparison and then treated as different minds.

Who should skip it

Skip it when the prompt is internal source that must not leave your network. An open listing such as GLM-5.2 or Kimi-K3 is the other shape of choice, described in open versus proprietary. Skip the row named Latest if you are about to write a config. Latest moves. Skip it for a one-line extraction if a cheaper model already does that job. Opus is the expensive end of a comparison, not the default for bulk classification.

First three steps

1. Confirm on Anthropic's own pages that the id you will call is Opus 5 and note today's price. Our price field can be empty or stale.
2. Run one prompt you can grade, including a file the model must not edit.
3. Write the five lines from the open-versus-proprietary guide: data class, exact name, hosted, vendor account, and whether the answer was acceptable.

Alternatives on this site

Gemini Flash listings are the cost-and-speed conversation. Grok 4.6 is another hosted flagship with a shorter listed window in our data. None of those substitutes knows your retention policy. Read the vendor page. The comparison guide is how to stop at two survivors.

Questions

Is the directory score a benchmark? No. It sorts the index.

Should I compare Opus 5 with Opus 5 Fast? Only if you are choosing a price and latency. Do not read that highlight as a quality win.