Claude Opus is Anthropic's flagship intelligence tier inside the Claude family, positioned above Sonnet and Haiku. Covers Opus dot-releases through the 4.x generation (4.0, 4.1, 4.5, 4.6, 4.7, 4.8 and successors), capabilities, pricing, and the workflows Opus is the right choice for.
A Claude Opus 5.5 migration looks like a one-line change. Swap claude-opus-5 for claude-opus-5-5, redeploy, enjoy the lower price. For a plain…
Claude Opus 5.5 shipped on September 22, 2026, sixty days after Opus 5, with a headline that makes two claims at once.…
Update, July 26, 2026: this post was written before Anthropic shipped Claude Opus 5 on July 24, 2026. That release landed less…
Opus 5 vs Fable 5 is a choice between two tiers of Anthropic’s own lineup: the new near-flagship workhorse and the top-tier…
Claude Opus 4.8 vs Opus 5 is the upgrade question every team on the Opus tier is now weighing, because Anthropic shipped…
Claude Opus 5 is Anthropic’s newest Opus model, released on July 24, 2026, and it moves Opus 4.8 out of the top…
The Claude Opus 4.6 to 4.7 cycle ran from February 19 to April 1, 2026, a 41-day window that exemplifies the accelerated…
Update, July 26, 2026: the current Opus generation is now Claude Opus 5, released July 24, 2026, which replaced Opus 4.8 at…
The phrase "frontier model" shows up in AI policy documents, procurement contracts, vendor marketing, regulatory filings, and architecture proposals. It is used…
The June 12, 2026 suspension of Claude Fable 5 and Claude Mythos 5 is the first time a publicly-deployed frontier AI model…