Anthropic: Claude Sonnet 5

Claude Sonnet 5 is a paid Anthropic model that accepts text, images, and files as input. It offers a 1,000,000-token context window and can return up to 128,000 tokens in a single completion, which suits long documents, large codebases, or extended multi-file sessions. It supports tool use and a reasoning mode; structured output support is not documented in the available data, so confirm it before relying on schema-constrained responses. At $2 per million input tokens and $10 per million output tokens, the input side is relatively inexpensive for large-context workloads, while output-heavy tasks will cost more. Its blended benchmark score of 63.9 rests on a single independent benchmark (AI Index score: 63.0), so its standing is thinly evidenced. Teams that need very long context, multimodal input, and tool calling should shortlist it, but should run their own evaluations rather than treat that one score as decisive.