Anthropic, a leading AI developer, has launched the next generation of its Claude models – Opus 4 and Sonnet 4. These powerful models are designed to tackle complex coding tasks with advanced reasoning and agentic capabilities. Now available in Amazon Bedrock, developers can immediately access these cutting-edge models, expanding their AI choices for building transformative applications.
The new models are optimized for specific use cases: Opus 4 excels in long-running, high-context tasks such as refactoring large codebases or synthesizing research, while Sonnet 4 is suited for efficiency at scale, making it ideal for high-volume tasks like code reviews and bug fixes. Both models offer hybrid reasoning capabilities, allowing developers to choose between near-instant responses and extended thinking.
Anthropic’s Claude Opus 4 is the most advanced model to date, designed for building sophisticated AI agents that can reason, plan, and execute complex tasks with minimal oversight. It demonstrates strong performance on coding and agent-focused benchmarks and can be used for writing and refining code across entire projects or managing full-stack architectures.
Claude Sonnet 4 complements Opus 4 by balancing performance, responsiveness, and cost, making it well-suited for high-volume production workloads. It’s optimized for everyday development tasks with enhanced performance and can power production-ready AI assistants for near real-time applications.
To get started with the new models, developers can enable them in their AWS accounts and use the Bedrock Converse API to send system and user prompts. Anthropic recommends using this API for its consistent functionality across all Amazon Bedrock models that support messages.
The Claude Opus 4 and Sonnet 4 are available today in Amazon Bedrock, a fully managed serverless service, offering developers immediate access to cutting-edge foundation models without the need for infrastructure management or complex integrations.
Source: https://aws.amazon.com/blogs/aws/claude-opus-4-anthropics-most-powerful-model-for-coding-is-now-in-amazon-bedrock