claude-opus-4-1 — pricing, context window and limits

Its published retirement date has already passed

This model's documented retirement date has already come and gone as of this site's last check, and we could not confirm whether retirement actually executed exactly on schedule. Treat this id as gone regardless — do not write new code against it, and if you're still calling it, that call is running on borrowed time whether or not it happens to still resolve today.

No effort parameter, and a materially higher price than the current lineup

This model predates the effort parameter entirely, relying on the older thinking-budget mechanism instead, and its per-token pricing sits well above every current model's rate. There is no scenario where continuing to call this id is the right cost decision relative to migrating.

Its pricing figures are excluded from every calculator on this site

Because this model is retired, none of this site's calculators price against it — the figures shown on this page are the last ones this site held on record before retirement, kept for reference only, not for planning a request against.

Related

See the model ID you're calling has been retired for what actually happens if you're still calling this id, and migrate to claude-opus-5, its documented successor.