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Claude Opus 4.5

Name: Claude Opus 4.5
Author: Anthropic

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

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Models

Claude Opus 4.5

Added 10 July 2026

#anthropic

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-4.5 Docs

OpenRouter id: anthropic/claude-opus-4.5

Benchmarks

Design Arena 3d (other) : 1289 elo · #21
Design Arena asciiart (other) : 1235 elo · #12
Design Arena codecategories (other) : 1286 elo · #19
Design Arena dataviz (other) : 1283 elo · #15

Notes

Claude Opus 4.5 is listed in the EDNA Models directory from the OpenRouter catalogue.

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