Amanda Caswell writes about Claude Fable 5.1, Anthropic's latest high-end model, and proposes a single prompt designed to showcase its agentic capabilities. The prompt asks the model to critique an existing project the user is already working on, identify what's wrong with their thinking, and then refactor or redesign the whole thing while explaining its reasoning at each decision point. Caswell tested it by uploading her entire book manuscript without giving any hints about what she thought was wrong, and found the model preserved her voice while surfacing issues she had missed.
- Features a 1-million-token context window, suited for large codebases and lengthy documents
- Anthropic claims reduced costs on agentic workloads through cheaper caching
- Caswell notes that LLM explanations are justifications, not literal transcripts of internal reasoning
- She contrasts Claude's more questioning approach with ChatGPT and Gemini, which she says tend to execute edits without challenging assumptions
>": I'm building describe a real project you're actually working on, in detail » . Here's my current approach: paste your code, outline, or plan » . Tell me what's wrong with my thinking, what I'm missing, and then refactor or redesign the whole thing — but explain your reasoning at each decision point so I can learn from it."
- Features a 1-million-token context window, suited for large codebases and lengthy documents
- Anthropic claims reduced costs on agentic workloads through cheaper caching
- Caswell notes that LLM explanations are justifications, not literal transcripts of internal reasoning
- She contrasts Claude's more questioning approach with ChatGPT and Gemini, which she says tend to execute edits without challenging assumptions
>": I'm building describe a real project you're actually working on, in detail » . Here's my current approach: paste your code, outline, or plan » . Tell me what's wrong with my thinking, what I'm missing, and then refactor or redesign the whole thing — but explain your reasoning at each decision point so I can learn from it."
