Claude Sonnet 4 (latest) (EU)

Claude Sonnet 4 belongs to Anthropic's Claude Sonnet family of large language models, developed by Anthropic as a mid-tier offering that balances capability with cost. Within the Sonnet lineage, Anthropic has positioned the series as a workhorse for production workloads, with each iteration broadening the model's competence in reasoning, instruction following, and structured output. The model accepts text, image, and PDF inputs and produces text outputs, making it suitable for multimodal understanding tasks such as document analysis and visual reasoning alongside traditional text generation. Its capability profile includes support for tool calling, configurable temperature, and structured output generation, which together enable reliable integration into agentic pipelines and developer-facing applications where deterministic, schema-conformant responses are required.

Practically, Claude Sonnet 4 fits workflows that demand a combination of analytical depth and flexibility. The model's reasoning capability makes it well suited for multi-step problem solving, while tool-calling support allows it to interact with external systems, retrieve information, and execute actions within agent frameworks. The Sonnet family has been a focal point of Anthropic's iterative improvements in coding proficiency, computer use, and long-context handling, with each version refining these skills. Developers evaluating Claude Sonnet 4 should consider it for tasks such as code generation and review, document comprehension across text and visual inputs, and orchestrated agent workflows where the model's reasoning and structured output capabilities can be combined with external tools to deliver end-to-end automation.