Introducing Claude 3.5 Sonnet

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Anthropic·anthropic.com/news/claude-3-5-sonnet

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High quality. Established institution or organization with editorial oversight and accountability.

Rating inherited from publication venue: Anthropic

This is Anthropic's official product announcement for Claude 3.5 Sonnet (June 2024), relevant for tracking AI capability progression and understanding how frontier labs communicate model releases and safety commitments.

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Importance: 45/100press releasenews

Summary

Anthropic announces Claude 3.5 Sonnet, describing it as their most intelligent model to date with significant improvements in reasoning, coding, and vision capabilities. The release highlights performance benchmarks surpassing previous Claude models and competitors, while also introducing new features like Artifacts for interactive content generation.

Key Points

•Claude 3.5 Sonnet sets new performance benchmarks in reasoning, coding, and vision tasks, outperforming Claude 3 Opus at faster speeds and lower cost.
•Introduces 'Artifacts' feature allowing users to generate, preview, and iterate on content like code, documents, and web pages in real time.
•Model demonstrates improved ability to understand nuance, humor, and complex instructions compared to previous Claude versions.
•Available via Anthropic API, Claude.ai, and various partner platforms at the time of launch.
•Represents Anthropic's approach to releasing capable models while maintaining safety commitments under their responsible scaling policy.

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Announcements Claude 3.5 Sonnet

 Jun 21, 2024 Try on Claude.ai Update Consumer Terms and Privacy Policy

 Aug 28, 2025

 

 Today, we’re launching Claude 3.5 Sonnet—our first release in the forthcoming Claude 3.5 model family. Claude 3.5 Sonnet raises the industry bar for intelligence, outperforming competitor models and Claude 3 Opus on a wide range of evaluations, with the speed and cost of our mid-tier model, Claude 3 Sonnet.

 Claude 3.5 Sonnet is now available for free on Claude.ai and the Claude iOS app, while Claude Pro and Team plan subscribers can access it with significantly higher rate limits. It is also available via the Anthropic API , Amazon Bedrock , and Google Cloud’s Vertex AI . The model costs $3 per million input tokens and $15 per million output tokens, with a 200K token context window.

 Frontier intelligence at 2x the speed

 Claude 3.5 Sonnet sets new industry benchmarks for graduate-level reasoning (GPQA), undergraduate-level knowledge (MMLU), and coding proficiency (HumanEval). It shows marked improvement in grasping nuance, humor, and complex instructions, and is exceptional at writing high-quality content with a natural, relatable tone.

 Claude 3.5 Sonnet operates at twice the speed of Claude 3 Opus. This performance boost, combined with cost-effective pricing, makes Claude 3.5 Sonnet ideal for complex tasks such as context-sensitive customer support and orchestrating multi-step workflows.

 In an internal agentic coding evaluation , Claude 3.5 Sonnet solved 64% of problems, outperforming Claude 3 Opus which solved 38%. Our evaluation tests the model’s ability to fix a bug or add functionality to an open source codebase, given a natural language description of the desired improvement. When instructed and provided with the relevant tools , Claude 3.5 Sonnet can independently write, edit, and execute code with sophisticated reasoning and troubleshooting capabilities. It handles code translations with ease, making it particularly effective for updating legacy applications and migrating codebases.

 State-of-the-art vision

 Claude 3.5 Sonnet is our strongest vision model yet, surpassing Claude 3 Opus on standard vision benchmarks. These step-change improvements are most noticeable for tasks that require visual reasoning, like interpreting charts and graphs. Claude 3.5 Sonnet can also accurately transcribe text from imperfect images—a core capability for retail, logistics, and financial services, where AI may glean more insights from an image, graphic or illustration than from text alone.

 Artifacts—a new way to use Claude

 Today, we’re also introducing Artifacts on Claude.ai, a new feature that expands how users can interact with Claude. When a user asks Claude to generate content like code snippets, text documents, or website designs, these Artifacts appear in a dedicated window alongside their conversation. This creates a dynamic workspace where they can see, edit, and build upon Claude’s creations in real-time, seam

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