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
~700 billion
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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