Claude Opus 5
Anthropic · Claude 5 · closed weights
Facts and where they come from
| Released | 2026-07 | labofficial docsannouncement dated Jul 24, 2026 |
|---|---|---|
| Licence | proprietary | labofficial docsweights not published |
| Total parameters | not disclosed | not disclosed |
| Active parameters | not disclosed | not disclosed |
| Context length | not disclosed | not disclosed |
Architecture
not disclosed No diagram or modelled costs: Anthropic has not disclosed the architecture or size.