In a recent LinkedIn post, Dan Sherrard Smith discusses the implications of Anthropic’s latest AI model, Fable, highlighting its ability to perform tasks autonomously over extended periods. This represents a significant advancement over previous models, which often falter on complex, multi-step projects.
As Dan Sherrard Smith notes, the key differentiator for Fable lies in its capacity for sustained focus. He explains that while many current AI models perform comparably on short, simple tasks like drafting an email, they struggle with more extensive projects.
“On a long task e.g. research 50 competitors, build a 90-day content plan, process 18 months of client transcripts, most models lose the thread.”
The journalist elaborates on the common pitfalls of existing AI, stating that these models can forget their objectives, become repetitive, deviate from the brief, or produce content requiring substantial editing. Fable, however, is engineered to maintain focus across thousands of steps, remember its original goal, self-monitor, and make corrections when necessary.
A New Unit of Work for Founders
Dan Sherrard Smith argues that this capability fundamentally changes the nature of work for founders. For the past two years, AI has primarily served as a tool to accelerate tasks like drafting and research, but it still required constant human direction. Fable, according to Sherrard Smith, shifts this paradigm.
“Hand it a project. And it will come back to the output.”
He points to early access feedback as evidence of Fable’s power. Sherrard Smith shares testimonials, including Stripe compressing months of engineering work into days and the CEO of Cursor describing it as capable of handling “a class of long-horizon problems out of reach for earlier models.” Additionally, Hebbia’s senior finance benchmark showed Fable achieving the highest score, and a legal team’s review found its redlines comparable or superior to their existing model.
Advanced Capabilities with Restraint
Beyond its autonomous task completion, Dan Sherrard Smith highlights the sophisticated safety architecture within Fable. He explains that the model is designed to detect requests in sensitive areas like cybersecurity, biology, and chemistry, and then hand these off to a more specialized model, Opus 4.8.
“This is the part I find genuinely interesting. The most capable model in the world but with restraint engineered into the product.”
While acknowledging that this safety feature can sometimes flag benign requests, Sherrard Smith emphasizes that 95% of sessions do not trigger such fallbacks. He concludes by suggesting that users still relying on AI for single prompts are effectively using outdated technology. Fable is currently available on paid Claude plans until June 22, and Sherrard Smith encourages experimentation.
📝 About This Content
This article is based on insights shared by Dan Sherrard Smith on LinkedIn.
📅 Originally posted on June 11, 2026 | View original post on LinkedIn →