Claude Sonnet 5.5 Officially Launches on B.AI, API and Web Chat Now Open

Odaily Planet Daily News – On September 29, B.AI announced that Anthropic's latest Sonnet model, Claude Sonnet 5.5, has officially launched on the platform. As a faster and more cost-effective complement to Claude Opus 5.5, Claude Sonnet 5.5 improves output speed by over 30% and reduces single-task costs by up to approximately 30%. It is designed for scenarios such as well-defined software engineering, daily agent workflows, and professional document creation. The model supports image and PDF comprehension, and can generate reports, presentations, spreadsheets, and UI designs. It offers five adjustable inference intensity levels and a 1-million-token context window, with no additional fees for long contexts. Currently, both the B.AI API and Web Chat are open, allowing developers and users to directly access this new-generation Sonnet model that balances speed, cost, and long-context capabilities.