Anthropic: Claude Sonnet 4

Claude Sonnet 4 is a closed, paid model from Anthropic that accepts text, images, and files as input. It supports tool use and reasoning, which makes it applicable to multi-step agentic workflows. Structured output support is unconfirmed. Its one-million-token context window is among the larger ones available, and a 64,000-token output ceiling gives it room for lengthy generations. At $3.00 per million input tokens and $15.00 per million output tokens, it sits in the mid-to-upper pricing tier, so cost-sensitive projects should weigh that carefully. Its blended benchmark score of 66.7 covers only three benchmarks, which is a narrow base for strong performance claims; treat that figure as a preliminary signal rather than settled proof. Teams that need large-context document processing, image understanding, and tool-calling in one model may find it worth evaluating, but should run task-specific tests before committing at this price.