Claude 1M Token Context Window GA for Opus 4.6 & Sonnet 4.6
Action Required
Users need to migrate to Claude Sonnet 4.6 or Claude Opus 4.6 to utilize the full 1M token context window and benefit from the expanded capabilities.
AI Impact Summary
Anthropic is significantly expanding the context window capabilities for Claude models, specifically Opus 4.6 and Sonnet 4.6, to 1 million tokens. This change is generally available at standard pricing, removing the previous beta requirement and dedicated rate limits. This allows users to process much larger inputs and outputs, opening up new possibilities for complex tasks like long-form content generation, large code generation, and agentic workflows. However, the 1M token context window remains in beta for Sonnet 4.5 and Sonnet 4, requiring migration to the newer models for full functionality.
Affected Systems
- Date
- Date not specified
- Change type
- capability
- Severity
- high