All corrections
1
Claim
Claude Opus 3.6
Correction
Anthropic does not have a publicly released model named “Claude Opus 3.6”; Anthropic’s docs list “Claude Opus 3” as `claude-3-opus-20240229` (retired Jan 5, 2026) and current Opus models as 4.x.
Full reasoning
Anthropic’s official documentation page **“Model deprecations”** states it “lists all publicly released models” and includes a table of model IDs. In that list (and in the deprecation history), Anthropic’s Opus v3 model is named **`claude-3-opus-20240229`** and it was retired on **January 5, 2026**—there is no “Opus 3.6” model name/ID shown.
Additionally, Anthropic’s own announcement page for its current flagship Opus model is **Claude Opus 4.6**, reinforcing that Opus naming at the time is 4.x (not 3.6).
Therefore, the post’s specific model name **“Claude Opus 3.6”** does not match Anthropic’s publicly released model names and appears to be incorrect (likely a typo for some other Claude model/version).
2 sources
- Model deprecations - Claude API Docs (Anthropic)
The page says it lists all publicly released models. It lists Opus models like `claude-opus-4-6` and shows “Claude Opus 3 model” as `claude-3-opus-20240229` with retirement date January 5, 2026—no model named “Claude Opus 3.6” appears.
- Introducing Claude Opus 4.6 | Anthropic
Anthropic’s announcement describes “Claude Opus 4.6” as the upgraded smartest model (Feb 5, 2026), indicating the Opus line at this time is 4.x, not “3.6”.