opus

A Claude Code settings key, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

What it is

Presence across releases

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Changelog entries naming it

1. v2.1.219Opus 5 replaces Opus 4.8 as the default Opus model

   Opus 5 is now the default Opus, with a 1M-context option in the model picker.

   named in this entry

Documentation pages

• model-deprecations mentions it Claude Developer Platform
• choosing-a-model mentions it Claude Developer Platform
• Or, for the model with the same capabilities and no access approval requirement: mentions it Claude Developer Platform
• model-ids-and-versions mentions it Claude Developer Platform
• optimizing-for-cost-and-intelligence mentions it Claude Developer Platform
• pricing mentions it Claude Developer Platform
• content-moderation mentions it Claude Developer Platform
• customer-support-chat mentions it Claude Developer Platform
• Create the full URL from the GitHub repository mentions it Claude Developer Platform
• PDF Processing mentions it Claude Developer Platform
• claude-api-skill mentions it Claude Developer Platform
• enterprise mentions it Claude Developer Platform

A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.

Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the settings key does. All settings keys.