What happened
Anthropic has released Claude Sonnet 4.5, a new large language model. The company states it is the best coding model in the world and the strongest model for building complex agents. It is also described as the best model at using computers.
Why it matters
- The model is designed to improve performance in coding and complex agent tasks.
- It offers enhanced safety and alignment features compared to previous versions.
- The release supports advanced use cases in software development and automation.
Key facts
- 1. Claude Sonnet 4.5 was released by Anthropic as their most capable model to date.
- 2. The model is described as the best in the world for coding and building complex agents.
- 3. The official announcement was published on Anthropicâs website on September 29, 2025.
