This model is deprecated
Claude 3.5 Sonnet was deprecated on Oct 22, 2025 and can no longer be run here. Its evaluation results and details remain available for reference. Try Claude Sonnet 5 instead.
Claude 3.5 Sonnet, introduced by Anthropic in June 2024 and upgraded in October 2024, is the mid-tier model of the Claude 3.5 family, designed to balance speed, cost, and advanced reasoning. It is multimodal, handling text and images, and the upgraded version introduced a “computer use” beta feature, allowing the model to interact with a desktop environment for tasks like cursor control and typing. With a 200,000-token context window, it supports long-context reasoning, coding, and multi-step workflows.
Sonnet is positioned as a cost-effective alternative to higher-end models, priced at $3 per million input tokens and $15 per million output tokens. It performs well on benchmarks relative to Claude 3 and earlier Opus models, and its upgrades enhanced tool use, coding, and agentic reasoning. However, Anthropic announced in August 2025 that Claude 3.5 Sonnet will be retired on October 22, 2025, with Claude Sonnet 4 recommended as its successor. Common use cases include enterprise-scale assistants, research workflows, and productivity automation.
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Claude 3.5 Sonnet is proprietary: the weights are not distributed, and the Claude 3.5 Sonnet license is the vendor's commercial terms of service that you accept when you call the API.
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