There is no Claude Opus 5, at least not yet. As of July 15, 2026, Anthropic's official lineup tops out at Claude Opus 4.8 for the Opus line, with Claude Fable 5 sitting above it as the company's most capable widely released model. No "Opus 5" appears in the API, the model docs, or any Anthropic announcement. Every Opus 5 spec circulating right now is a leak, not a launch.
What Anthropic has actually shipped
The current frontier is a two-part story. Opus 4.8 (released May 2026, at 5 dollars per million input tokens and 25 dollars output) remains Anthropic's recommended default for complex agentic coding and enterprise work, with a 1M-token context window and a January 2026 knowledge cutoff. Above it, Fable 5 went generally available on June 9, 2026 at 10 and 50 dollars per million tokens, billed as next-generation intelligence for long-running agents, alongside the invitation-only Mythos 5 in Project Glasswing. The newest speed-tier model, Claude Sonnet 5, shipped June 30.
What is only rumored
The Opus 5 talk comes from internal model leaks and third-party reporting pointing to a possible Opus 4.9 or 5.0 in the July-to-August window. None of it is confirmed: there is no model card, no pricing page, and no dated model ID. Treat any benchmark number or release date you see as provisional until it appears in Anthropic's own release notes.
The shift that matters more than a version number
When Opus 4.7 launched, Anthropic conceded that Opus trailed its then-unreleased Mythos model on benchmarks, and it framed Opus 4.8 as a reliable bridge rather than the ceiling. Instead of a traditional Opus 5, the company introduced a new Mythos-class tier with Fable 5 and Mythos 5. So the real question is not when Opus 5 ships, but whether Anthropic's next flagship carries the Opus name at all.
What to do now
Do not architect a workflow around leaked Opus 5 specs. If you need maximum capability today, build on Fable 5; if you want the best price-to-performance for agentic coding, Opus 4.8 is the safe default and stays supported regardless of what the next model is called. Keep your model ID pinned to a snapshot, and revisit when a real Opus 5 model card appears, not before.
