Analyze Massive Documents Instantly Using Claude Fable 5's 1M Context Window
Upload entire project archives or long books for deep analysis.
Leverage the 1M token context window of Claude Fable 5 to analyze massive datasets or long-form documents in a single prompt without chunking.
The Scenario
You have a massive corpus of text, such as a 500-page legal contract or a year's worth of research papers, and you need a single, coherent analysis without losing detail.
Before & after
Users previously had to split long documents into chunks, summarize each part separately, and then synthesize them manually. This process often took 45–60 minutes and risked losing global context.
Using Claude Fable 5, you can process the entire document in one go with its 1M token window. This takes roughly 2-5 minutes to upload and generate a high-precision summary.
The Prompt
I am uploading a very long document (up to 1 million tokens). Please provide a comprehensive analysis that identifies [SPECIFIC_THEMES], summarizes the key findings in [SECTION_NAME], and highlights any contradictions found across the different chapters. [PASTE_TEXT_OR_UPLOAD_FILE]
Fable 5's 1M context window is designed for 'ambitious, long running work' where complex tasks are sustained over extended periods.
Source
Claude Platform - Claude API Docs"Both models support a 1M token context window by default, 128k max output tokens, and always-on adaptive thinking."