Claude Opus 5.5
Claude Opus 5.5 is Anthropic's current Opus model for long-running agentic coding and knowledge work, with a 1M-token context window.
Overview
Claude Opus 5.5 accepts text and images and returns text. Anthropic lists a 128K standard maximum output, adaptive thinking, and availability through the Claude API and supported cloud platforms.
Model specifications
- Family
- Claude 5.5
- Context
- 1,000,000 tokens
- Input
- Text, Image
- Output
- Text
- Open weights
- No
- Capabilities
- Reasoning, Vision, Tool Use, Computer Use
Related entities
Amp
Amp is a coding agent from Amp Frontier Corporation that runs in the terminal, on the web, in cloud orbs, and through desktop and mobile apps, with integrations for common code editors.
Anthropic
Anthropic is an AI research and product company that develops Claude models, the Claude API, and products including Claude Code.
Claude Code
Claude Code is Anthropic's coding agent for working directly with a codebase from the terminal, supported IDEs, the web, GitHub, Slack, and other product surfaces.