Anthropic released Claude Sonnet 4.6, positioning it as a hybrid reasoning model with 1M token context window designed for agents, coding, and enterprise workflows.

The model starts at $3 per million input tokens and $15 per million output tokens. Users can access up to 90% cost savings through prompt caching and 50% savings via batch processing.

Sonnet 4.6 is available on Claude.ai for consumer use and through the Claude Platform API for developers. The company also made it accessible via Amazon Bedrock, Google Cloud's Vertex AI, and Microsoft Foundry.

Performance claims across coding and agents

Anthropics says Sonnet 4.6 delivers "frontier performance" across the software development lifecycle, from planning to debugging and large-scale refactors. The model can handle multi-file codebases and produce what the company calls "precise implementations."

For autonomous workflows, Sonnet 4.6 offers instruction following, tool selection, and error correction capabilities. The company positions it for customer-facing agents and production AI systems that operate independently.

The model includes computer use capabilities, building on Anthropic's previous work making Claude the first frontier model to control computers directly. Sonnet 4.6 can handle browser-based tasks including competitive analysis and procurement workflows.

Replit CEO Amjad Masad said in a company statement: "The performance-to-cost ratio of Claude Sonnet 4.6 is extraordinary — it's hard to overstate how fast Claude models have been evolving in recent months."

GitHub noted the model "is already excelling at complex code fixes, especially when searching across large codebases is essential."

Sonnet 4.6 represents Anthropic's latest iteration in its Claude model family, following Sonnet 4.5 released in September and Sonnet 4 from May. The company describes this as part of its broader effort to build "helpful, harmless, honest AI."

The 1M token context window is currently available in beta through the API only. Developers can access the model using the identifier claude-sonnet-4-6 via the Claude API.