Claude Sonnet 4.6 Is Here: 1M Token Context and Agentic Web Search Now GA — What AI Coders Need to Know

Anthropic just pushed Claude Sonnet 4.6 to general availability with two capabilities that fundamentally change how AI-assisted coding works: a 1 million token context window and agentic web search built into the model. The 1M context window means you can feed an entire large codebase into a single conversation and ask questions across all of it simultaneously — no more chunking, no more retrieval hacks, no more 'the model doesn't know about file X because I didn't include it.' The agentic web search means Claude can now self-resolve documentation lookups, stack traces, CVE information, and API references without you having to paste them in. Together, these aren't incremental upgrades. They change the economics and mechanics of how you use the model in your development workflow. Here's everything AI coders need to know.