Anthropic
The most capable autonomous intelligence system engineered by Anthropic, restricted to Project Glasswing participants.
1M ctx$10.00 / 1M tok (Glasswing Exclusive)
Introducing Claude Opus 5.5AnthropicReleased September 22, 2026
Claude Opus 5.5
Anthropic Claude model for long-running agentic coding and knowledge work.
reasoning-llmProprietary APIUSD 4 / 1M input tok; USD 20 / 1M output tokContext: 1M (1,000,000 tokens)
Technical Specifications
Architecture Type
Dense Transformer / MoE
Total Parameters
Undisclosed
Context Window
1M (1,000,000 tokens)
Max Output Tokens
128K (128,000 tokens)
Knowledge Cutoff
June 2026
Supported Modalities
text, code, vision, reasoning
License & Access
Proprietary API
Deep Architectural Overview
Claude Opus 5.5 provides adaptive thinking, 1M-token context, 128K maximum output, text and image input, text output, vision, and tool use.
Strengths & Considerations
Core Strengths
- Long-running agentic coding
- Knowledge work
- Vision and tool use
Token & API Pricing
Input Tokens (1M)$4.00
Output Tokens (1M)$20.00
Cached Input (1M)$0.2000
Pricing is verified directly against Anthropic's developer documentation and API rate sheets.
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