Claude Opus 5.5
Premium Current advanced reasoning Zero Data Retentionby Anthropic Claude
Details
Our most capable model — frontier-level reasoning for complex agentic work, long-horizon tasks, and enterprise projects
Context window
1M tokens
Max output
128K tokens
Provider
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Anthropic Claude
Pricing
Premium
PDF support
Yes
Zero Data Retention
Yes
Added
September 22, 2026
Features
Extended thinking
Adaptive