# Sonnet 4.6

- [Claude's 1M Context Window Is Now Standard: What Actually Changes for Agentic Coding](https://sdd.sh/2026/04/claudes-1m-context-window-is-now-standard-what-actually-changes-for-agentic-coding.md): On March 13, Anthropic made the 1M token context window standard on Sonnet 4.6 and Opus 4.6 — no beta header, no pricing premium above 200K. Here is what that actually changes for coding agents, how it compares to the competition, and what it still cannot solve.