Claude Opus 4.8
Anthropic's most capable model for complex reasoning, long-horizon agentic coding, and high-autonomy professional work
Claude Opus 4.8
Anthropic • May 2026
Training Data
Up to January 2026
Claude Opus 4.8
May 2026
Parameters
Not disclosed
Training Method
Advanced Constitutional AI
Context Window
1,000,000 tokens
Knowledge Cutoff
January 2026
Key Features
1M Context Window • Adaptive Thinking • Long-horizon Agentic Coding
Capabilities
Reasoning: Maximum
Coding: Outstanding
Agentic Work: Outstanding
What's New in This Version
Builds on Opus 4.7 with stronger benchmark performance, sharper collaboration, better long-running work consistency, and more efficient tool use
Anthropic's most capable model for complex reasoning, long-horizon agentic coding, and high-autonomy professional work
What's New in This Version
Builds on Opus 4.7 with stronger benchmark performance, sharper collaboration, better long-running work consistency, and more efficient tool use
Technical Specifications
Key Features
Capabilities
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