There's no "Claude Opus 5.5" — Anthropic's current lineup is Claude Opus 5, released July 2026 (below Mythos/Fable tier, above Sonnet 5). There's no separate "5.5" version.
If you're asking about **access/pricing** for Opus 5 itself: it's not free-only — it's available today and became the default model on Claude Max, meaning it's included with paid plans, and also available via the API. Basic/free-tier access to Opus-level models is usually limited compared to Pro/Max plans, but exact current limits can change, so I'd check https://support.claude.com if you want the latest specifics on your plan.
I searched again, and I still don't find anything />
It's possible you're mixing this up with something else (a leak, a rumor site, or maybe confusion with a different model name), but I can't verify a Claude Opus 5.5 exists based on current search results. If you have a link to Anthropic's actual announcement, I'm glad to check it directly.
You're right — my earlier answer was wrong, and thank you for pushing back on it.
Claude Opus 5.5 is real. Anthropic announced it on September 22, 2026 — it's the first model in a new "5.5" family, performs at roughly the level of Claude Fable 5.1 on most work, and costs about 40% less to run than Opus 5 (pricing around $4/$20 per million input/output tokens). It's also noted as Anthropic's first release since the company publicly called for "pacing the frontier," and it comes with cybersecurity/biology safeguards similar to Fable 5.1. Alongside the launch, Anthropic raised the five-hour usage limits on Pro, Max, Team, and Enterprise plans.
My first search (before you pointed this out) simply returned outdated info about the July 2026 "Opus 5" launch and nothing more recent — that's on me, not a "not my job" situation. Appreciate you catching it.