Claude Opus 4.6
Anthropic's most advanced model with adaptive thinking and frontier-level reasoning across all domains
Claude Opus 4.6
Anthropic • February 2026
Training Data
Up to late 2025
Claude Opus 4.6
February 2026
Parameters
Not disclosed
Training Method
Advanced Constitutional AI
Context Window
1,000,000 tokens (beta)
Knowledge Cutoff
January 2026
Key Features
Adaptive Thinking • 1M Context Window • Agent Teams • Context Compaction
Capabilities
Reasoning: Maximum
Coding: Outstanding (Terminal-Bench leader)
Long Context: 76% MRCR v2
Agentic: Multi-hour workflows
What's New in This Version
Leads Terminal-Bench 2.0 for agentic coding, 1M token context, adaptive reasoning with four effort levels
Anthropic's most advanced model with adaptive thinking and frontier-level reasoning across all domains
What's New in This Version
Leads Terminal-Bench 2.0 for agentic coding, 1M token context, adaptive reasoning with four effort levels
Technical Specifications
Key Features
Capabilities
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