Launched Feb 17, 2026, as the new default for high-volume enterprise work.nnKey FeaturesnA 1-million token context window (beta) and ‘human-level’ capability in navigating complex spreadsheets and multi-step web forms.nnUse CasenUsed by firms like Cognition and Cursor for ‘Devin Review’ to catch high-severity bugs across entire codebases in parallel.nnWhy Choose Sonnet 4.6?nIt effectively ‘closes the gap’ with the Opus series on reasoning while maintaining the speed and cost efficiency of a mid-tier model.