Claude Sonnet 4's 1M Token Window: A Practical Take for Builders
Anthropic just announced a 5x context window increase for Claude Sonnet 4, pushing it to 1 million tokens. While big numbers in AI are common, this move has tangible, practical implications for those of us building complex systems. From my perspective, this isn’t just a quantitative leap; it’s a qualitative one that unlocks a new class of problems we can solve. Moving from File Analysis to System-Level Understanding The ability to load an entire codebase—over 75,000 lines with source files, tests, and docs—into a single prompt is a significant shift. Previously, AI code analysis was often limited to individual files or small modules. We could check for errors or refactor a specific function, but the AI lacked a holistic view. ...