Claude 3.5 Sonnet

Claude 3.5 Sonnet is a multimodal language model developed by Anthropic, first released on June 20, 2024. It records an MMLU-Pro score of 78.0, an Arena ELO rating of 1268, and a SWE-bench Verified score of 49.0—benchmarks that, at launch, exceeded the performance of the larger Claude 3 Opus on graduate-level reasoning, coding, and vision tasks while operating at twice the speed. The model processes text and image inputs with a 200,000-token context window and is priced at $3.00 per million input tokens and $15.00 per million output tokens. Anthropic introduced a new Artifacts feature alongside the release, enabling a dedicated workspace for generated code and documents. It matters now because its specific score triplet—particularly the 49.0 on SWE-bench Verified and 78.0 on MMLU-Pro—established a documented price-performance ceiling for mid-tier models that subsequent releases were measured against, providing a concrete, verifiable reference point in enterprise model evaluations.

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