Anthropic has announced the updated version of the artificial intelligence Claude Sonnet 4.6, which has become the foundational model for the Claude and Claude Cowork services. The new version features significant improvements in coding, document handling, and logical data analysis, while maintaining a competitive cost of use comparable to the previous version.
This is reported by Business • Media
Key Changes and New Features
Sonnet 4.6 stands out with a contextual window of up to 1 million tokens in beta mode, allowing the model to process large codebases, lengthy contracts, and extensive research materials in a single request. This opens up new opportunities for analyzing complex data across various business and development sectors.
The model demonstrates enhanced accuracy in following instructions, a reduction in errors and “hallucinations,” and a more stable performance in handling multi-step tasks. Interaction skills with computer interfaces have also improved: Sonnet 4.6 can simulate user actions, such as virtual clicks or text input, enabling the automation of complex workflows.
“Sonnet 4.6 features a contextual window of up to 1 million tokens (in beta mode). According to the developers, this allows for processing large codebases, lengthy contracts, and sets of research materials in a single request.”
Comparison with Opus and Security
According to internal tests and implementations, Sonnet 4.6 has shown increased efficiency in document analysis, financial calculations, and managing agent tasks. In practice, the new model has approached the capabilities of Opus while remaining more affordable — from $3 to $15 per million tokens.
Anthropic emphasizes that developers with early access often prefer Sonnet 4.6, sometimes even over the flagship Opus 4.5. Additionally, the model has undergone extensive security testing and demonstrates a level of reliability that matches or even exceeds previous company solutions.
It is worth noting that the Claude artificial intelligence had previously been involved in special operations for the U.S., particularly during the campaign against Maduro, indicating recognition of the tool at the highest government level.
