Claude Opus 4.6

Claude Opus 4.6 was released February 5, 2026. Introduced adaptive thinking with four effort levels, agent teams for splitting tasks, and 1M-token context window (beta). Scored 68.8% on ARC-AGI-2 (83% improvement over Opus 4.5), 65.4% on Terminal-Bench 2.0, and 72.7% on OSWorld. Priced at \$5/\$25 per million tokens.