With Claude Sonnet 5, Anthropic has released a supposedly noticeably improved version of its AI model for the most extensive use cases, which is said to catch up to or even surpass the high-end Opus 4.8 model in sub-disciplines. The main improvement has been in its agentic functionality, which means tasks are to be completed independently. The new model “can make plans, use tools like browsers and the console, and operate autonomously to an extent that just months ago required larger and more expensive models,” Anthropic writes. In addition, there is a toolbox for research and the announcement that export restrictions for Fable 5 and Mythos 5 are to be lifted.
Claude Sonnet is Anthropic's AI model that promises the best possible performance for the broadest use cases. For those using Anthropic's AI technology for free or in the Pro offer, the model is the pre-selected standard. According to several benchmarks published by the AI company, there is a sometimes significant improvement compared to the predecessor, with which Sonnet is catching up to Opus 4.8. In agentic tasks, the top model, Opus 4.8, is even almost invariably surpassed. This has been confirmed in external tests; Sonnet now successfully completes tasks that were previously aborted. The model also checks the results without being prompted. All of this is available at better prices.
