Anthropic Ships Claude Opus 4.6 with 1M Context Window
Anthropic Blog · Apr 5, 2026
Anthropic's latest model doubles the context window to 1M tokens while improving code generation and multi-step reasoning. Available via API and Claude Code CLI.
The 1M context window is a game-changer for document-heavy government workflows. An entire OPORD, all annexes, and supporting intelligence products fit in a single context. But it's still a cloud API — the real win is when these capabilities run on local hardware. We're watching the open-source models close the gap.