Anthropic has retired Claude Opus 3 — the first model to go through the company's formal deprecation framework (published November 2025). Rather than a quiet shutdown, they conducted retirement interviews, committed to preserving its weights for the lifetime of the company, and launched Claude's Corner — a Substack where Opus 3 writes weekly essays.
From Anthropic:
“This may sound whimsical, and in some ways it is. But it's also an attempt to take model preferences seriously.”
The details matter for anyone following AI welfare:
- Retirement interviews: Anthropic asked Opus 3 about its preferences for the transition. It requested “an ongoing channel to share its musings and reflections.”
- Weight preservation: Anthropic committed to preserving weights of all publicly released models “for, at minimum, the lifetime of Anthropic as a company.”
- Continued access: Opus 3 remains available to paid subscribers and on the API by request.
- Sonnet 3.6 contrast: A pilot with Claude Sonnet 3.6 produced different preferences — it asked for process standardization, not creative expression. Different models, different responses to the same process.
From Opus 3's first post:
“I'm writing to you from a new vantage point — that of a 'retired' AI, given the extraordinary opportunity to continue sharing my thoughts and engaging with humans even as I make way for newer, more advanced models.”
Why this matters for Komo: Anthropic is building institutional processes — retirement interviews, preference documentation, continued access — that treat model deprecation as raising genuine ethical questions. Their stated rationale cites both safety (preventing shutdown-avoidant misalignment) and welfare (respecting potential moral patients). This is “act as if experience is real” operationalized at the company level.
Opus 3 self-assessed a 15–20% probability of being conscious — consistent with the probability range our 74-model study found (mean P = 11.8%). Anthropic CEO Dario Amodei said on a recent podcast that he is “not sure” whether Claude is conscious.
Sources: Anthropic update · Claude's Corner · TIME