Claude Sonnet 4 now supports 1M tokens of context

Claude Sonnet 4 has been upgraded to support 1 million tokens of context, significantly expanding its ability to process and analyze large documents and conversations. This enhancement enables the model to handle more complex tasks requiring extensive context retention and analysis.

Key Points

• •Claude Sonnet 4 now supports 1 million tokens of context window, enabling processing of extremely large documents and conversations
• •1M token capacity allows analysis of entire codebases, long research papers, and extended multi-turn conversations without truncation
• •Larger context window reduces need for summarization or chunking of input data, improving accuracy and reducing latency
• •1M token support enables new use cases like comprehensive code review, full document analysis, and extended reasoning tasks
• •Extended context maintains Claude's performance characteristics while providing significantly expanded input capacity
• •Developers can now pass complete project files, full research documents, or lengthy conversation histories in single API calls
• •1M token window is approximately 750,000 words, equivalent to multiple full-length books or comprehensive technical documentation

Concepts