Claude Opus 4.6 is Anthropic's most intelligent model released in February 2026, built for agents that operate across entire workflows rather than single prompts. It features a 1M-token context window, 128K max output tokens, and the ability to spawn and coordinate multiple sub-agents working in parallel — a capability called Agent Teams. With adaptive thinking that dynamically adjusts reasoning depth, the model excels at large codebases, complex refactors, sustained knowledge work, and end-to-end project execution, producing near-production-ready documents and analyses in a single pass.