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Claude 4.6 Explained — 1M Context, Agent Teams, and the ARC-AGI-2 Leap

Anthropic released Claude Opus 4.6 (Feb 5) and Sonnet 4.6 (Feb 17) in 2026. A 1M-token context window for both models, Agent Teams exclusive to Opus, and a 4.3x ARC-AGI-2 jump for Sonnet — here is what these models actually change, explained from an edtech perspective.