Introducing Claude 3.5 Sonnet

Today we are releasing Claude 3.5 Sonnet, our most capable model yet. It substantially improves on the prior generation across reasoning, code, mathematics, and visual understanding benchmarks. Customers can access Claude 3.5 Sonnet today through our API, the Claude.ai web interface, and through our partner cloud platforms.

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

Operating at twice the speed of Claude 3 Opus, this performance comes paired with cost-effective pricing. As a result, Claude 3.5 Sonnet is 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%.

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 Vertex AI. The model costs $3 per million input tokens and $15 per million output tokens, with a 200K token context window.