Claude Sonnet 4vsClaude 3 Opus

Claude Sonnet 4 is Anthropic's balanced mid-tier model, offering an excellent combination of intelligence, speed, and cost-effectiveness. It ranks among the top 5 models globally on arena benchmarks while being significantly more affordable than Opus 4. With a 200K token context window, Sonnet 4 handles long documents and complex codebases with ease. The model excels at coding tasks (strong SWE-bench performance), long-form writing, document analysis, and structured data extraction. Its extended thinking capabilities allow it to tackle complex problems while maintaining fast response times for everyday tasks. Sonnet 4 is the most popular Claude model for production applications, offering the best price-to-performance ratio in Anthropic's lineup. It supports tool use, vision capabilities, and works seamlessly in agentic workflows.

Claude 3 Opus, developed by Anthropic, is the most capable model in the Claude 3 generation with a 200K token context window. The model specializes in complex analysis, research synthesis, nuanced writing, and tasks requiring deep comprehension of lengthy documents. Claude 3 Opus demonstrated state-of-the-art performance when released, matching or exceeding GPT-4 on multiple benchmarks including MMLU and HumanEval. Its Constitutional AI training approach emphasizes safety and accuracy while maintaining strong creative and analytical capabilities. Priced at $15.00 per million input tokens and $75.00 per million output tokens, it targets enterprise use cases where output quality justifies premium pricing. Claude 3 Opus ranks #7 on the Chatbot Arena leaderboard, reflecting its position among the most capable language models available.