Anthropic has launched its next-generation AI models, Claude Opus 4 and Claude Sonnet 4 , positioning them as major advancements in AI coding, reasoning, and agentic capabilities. The release is part of the broader Claude 4 update , which also includes new developer tools, improved memory functions, and enhanced agent workflows. When granted file access, Opus 4 can create and reference memory files, increasing contextual understanding and long-term coherence.
Both models introduce “extended thinking with tool use” in beta, allowing Claude to alternate between internal reasoning and external tools like web search. They also support parallel tool execution, improved memory handling, and enhanced instruction-following.
Claude Sonnet 4, on the other hand, is said to be a substantial upgrade from Sonnet 3.7, balancing high performance with efficiency. It is claimed to achieve a 72.7% score on SWE-bench and is designed for both internal use and third-party deployment. Both models are accessible via the Claude Pro, Max, Team, and Enterprise plans, with Sonnet 4 also available to free-tier users. The Claude 4 launch is available now across the Anthropic API, Amazon Bedrock, and Google Cloud Vertex AI.
The model has already been adopted by GitHub as the core of its new Copilot coding agent. Pricing remains unchanged from the previous generation.