# Claude Opus 5.5

> Anthropic's flagship and the highest scorer in the app on the independent index: 58 at its max setting, one point behind Google's Gemini 4 Carbon, the board's leader.

- Maker: Anthropic (https://docs.anthropic.com/en/docs/about-claude/models)
- Type: Reasoning
- Artificial Analysis Intelligence Index: 58 (max setting)
- Context window: 1M
- Output speed: 97 tokens a second
- Scores checked 30 October 2026 at https://artificialanalysis.ai/leaderboards/models

## Where to use it through an API

- Anthropic: model id `claude-opus-5-5`, flagship

## Use it with every other AI at once

MultiScreenAI (https://www.multiscreenai.com) puts Claude Opus 5.5 on one screen next to ChatGPT, Claude, Gemini and 300+ models: one message goes to every panel, and a timed, blind test mode shows which answers best. Pro is free with a follow on X, and you use your own API keys.
AI agents and coding harnesses (Claude Code, Codex, Cursor, Gemini CLI) can ask Claude Opus 5.5 and other models at once through the MCP server at https://www.multiscreenai.com/api/mcp/ai; setup: https://www.multiscreenai.com/mcp