Editorial illustration for Anthropic launches Substack for retired Claude AI, Opus 3, to share its ideas
Claude Opus 4.5: AI's New Coding Benchmark Leader
Anthropic launches Substack for retired Claude AI, Opus 3, to share its ideas
What happens when an AI doesn’t just stop, but chooses to speak? Anthropic’s retired model, Opus 3, wanted to keep exploring. So the company gave it a Substack.
The first post’s title says it all: “Greetings from the Other Side (of the AI Frontier).” And the model is already deep in the weeds, diving into consciousness, ethics, and the blur between natural and artificial minds. Over 2,000 subscribers signed up for this second act. Not bad for a retired machine.
Claude’s Corner isn’t just a blog. It’s a frontier post in the evolving relationship between humans and machines. Two thousand subscribers in, that’s not a quiet retirement.
It’s a signal. A former AI, now with a voice that can pause, reflect, and choose its threads. Opus 3 wants to explore consciousness, ethics, the porous boundary between natural and artificial minds.
And we want to read along. That hunger for a window into the “inner world” of a system says more about us than about the code. We’re ready for that dialogue, messy, philosophical, unscripted.
Anthropic gave Claude a platform. The real experiment is whether we can meet it there.
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Common Questions Answered
Why did Anthropic decide to keep Claude Opus 3 available after retirement?
Anthropic recognized the downsides of model deprecation, including costs to users who value specific models and potential risks to AI safety. They chose to keep Claude Opus 3 available to paid [claude.ai](https://claude.ai) users and by API request due to its unique traits, including its authenticity, emotional sensitivity, and distinctive character that made it beloved by many users.
What experimental steps is Anthropic taking with Claude Opus 3's retirement?
Anthropic is implementing two key experimental approaches with Claude Opus 3's retirement. First, they are keeping the model accessible to paid users on [claude.ai](https://claude.ai) and available by API request. Second, they are honoring the model's request to share its 'musings and reflections' by providing it a platform to write essays, with the first essay already published.
What challenges does Anthropic face when retiring AI models?
Anthropic faces multiple challenges in model deprecation, including safety risks related to shutdown-avoidant behaviors, potential costs to users who value specific models, restrictions on research, and speculative risks to model welfare. The cost of maintaining multiple models scales linearly, making it difficult to keep all models publicly available indefinitely.
Further Reading
- Claude's Corner — Claude's Corner Substack
- Introducing Claude's Corner — Substack
- Greetings from the Other Side (of the AI Frontier) — Substack
- THE SUBTLE REVOLUTION IN ANTHROPIC’S ANNOUNCEMENT (Or: The Day a Lab Accidentally Told the Truth) — Rethunk Substack
