Artificial intelligence startup Anthropic has launched its latest model, Claude Sonnet 4.5. The new model excels in coding, cybersecurity, finance, and research fields. It generates higher-quality code and can follow instructions more reliably than other models. According to industry benchmarks, it is the “best coding model in the world”. With improved safety features, it can run autonomously for 30 hours without losing focus on complex tasks.
Anthropic’s co-founder Jared Kaplan described Claude Sonnet 4.5 as a smarter and more reliable colleague that makes it fun to work with when encountering problems. The company recommends this model for “basically every use case” but offers paid subscribers the option to use Opus instead. Additional models are on the horizon, including potential releases of Opus, according to Kaplan.
Source: https://www.cnbc.com/2025/09/29/anthropic-claude-ai-sonnet-4-5.html