Claude Sonnet 4.5 Released: 1M Context, 30 Hours of Autonomous Operation
Anthropic released Claude Sonnet 4.5 on September 29, 2025. It is integrated into the Anthropic API, Amazon Bedrock, Google Cloud Vertex AI, and GitHub Copilot, with pricing consistent with the previous generation, and it utilizes the ASL-3 security framework. Key enhancements include: In conjunction with the…