Claude Opus 4.5
by Anthropic
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal ca
Models
Claude Opus 4.5
Added 10 July 2026
Overview
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...
How to use / API access
Call via OpenRouter with model id `anthropic/claude-opus-4.5`.
- openrouter ·
anthropic/claude-opus-4.5Docs
OpenRouter id: anthropic/claude-opus-4.5
Benchmarks
- Intelligence Index (artificial-analysis): 29.1 index
- Design Arena 3d (other): 1214 elo · #43
- Design Arena asciiart (other): 1193 elo · #28
- Design Arena codecategories (other): 1244 elo · #43
- Design Arena dataviz (other): 1244 elo · #36
Notes
Claude Opus 4.5 is listed in the EDNA Models directory from the OpenRouter catalogue.
Get the free Developer’s Field Guide
A 27-page field guide to the AI coding workflow with Claude. Claude Code, MCP servers, the prompt patterns that work, and what to delegate. Free.
Enter your work email. We send it straight over, plus a few short notes worth knowing. Unsubscribe any time.