Claude Sonnet 4.6 goes live

Anthropic has pushed Claude Sonnet 4.6 into production and folded it into a new “What’s new in Claude 4.6” page that groups Sonnet 4.6 with Claude Opus 4.6 as the current developer-facing release set. The change is less about a flashy new consumer launch than about telling builders which model names, docs, and deployment paths are now the stable ones to target. (platform.claude.com, platform.claude.com) To understand why that matters, it helps to know how Anthropic organizes its model family. “Sonnet” is the company’s general-purpose workhorse tier, aimed at daily production use and a balance of speed, cost, and capability, while “Opus” is the higher-end tier for harder reasoning, coding, and agent-style workloads. (anthropic.com, anthropic.com) That split shapes how developers choose a model. A product team building customer support, document analysis, or routine software features will often start with Sonnet because it is designed for scaled production, while teams chasing the highest performance on more complex tasks may move up to Opus. (anthropic.com, anthropic.com) Anthropic’s new documentation makes that lineup more explicit. The “What’s new in Claude 4.6” page describes Claude 4.6 as the next generation of Claude models and says it summarizes the new features and application programming interface improvements available at launch for both Opus 4.6 and Sonnet 4.6. (platform.claude.com) The practical signal is that Sonnet 4.6 is no longer being presented as a preview or edge case. Anthropic’s model pages now tell developers to use the model identifier `claude-sonnet-4-6` through the Claude application programming interface, and the Sonnet product page describes it as built for daily use, scaled production, and complex tasks across coding, agents, and professional workflows. (anthropic.com) The other important change is not the model itself but where requests go after a developer sends them. Anthropic’s model overview says that, starting with Claude Sonnet 4.5 and later models including Sonnet 4.6, Amazon Web Services Bedrock and Google Vertex Artificial Intelligence offer two endpoint types: global endpoints and regional endpoints. (platform.claude.com) An endpoint is the network address a developer points software at when it asks a model for an answer. A global endpoint works like a ride-hailing app sending your request to whichever available driver can pick it up fastest, while a regional endpoint keeps the trip inside a defined geography. (platform.claude.com) Anthropic says global endpoints use dynamic routing for maximum availability. In plain terms, traffic can be shifted across infrastructure as conditions change, which can help when demand spikes or when a provider wants to keep response times steady. (platform.claude.com) Regional endpoints trade some of that flexibility for geographic guarantees. Anthropic’s documentation says they provide guaranteed data routing through specific geographic regions, which is the kind of setting companies ask for when contracts, regulators, or internal rules require tighter control over where data is processed. (platform.claude.com) That choice can affect cost as well as compliance. Anthropic’s pricing documentation says regional endpoints carry a 10 percent premium over global endpoints on supported platforms, while the first-party Claude application programming interface is global by default. (platform.claude.com) So the Sonnet 4.6 production move lands as two updates wrapped together. One is a model-status update that tells developers Sonnet 4.6 is ready to be the default workhorse in production; the other is an infrastructure update that forces teams to choose between dynamic global routing and geography-specific routing before they deploy at scale. (platform.claude.com, platform.claude.com, platform.claude.com) For developers, that means the headline is not just “new model available.” It is “new stable model plus a clearer map of where your traffic goes,” which is the kind of detail that decides whether a system is cheap, fast, compliant, or all three only in certain regions. (platform.claude.com, anthropic.com)