claude-3-opus
A Claude Code model, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.
Claude Code now keeps a list of the older Claude 3 models and a check for whether the current model is outside it
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.288.
In the changelogs
2Releases whose published page names claude-3-opus.
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v2.1.288
Claude Code now groups the older Claude 3 models together
Claude Code now keeps a list of the older Claude 3 models and a check for whether the current model is outside it
found in this entry's text
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v2.1.126
Read-tool no longer injects a model-specific malware-analysis system reminder
found in this entry's text
First cited
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
Presence across releases
0The 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.
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 model does. All models.