Claude Opus 4.5

Language modelPrevious generationCard summarized

Intelligent, efficient, and the best model in the world for coding, agents, and computer use

Active (legacy) · retires not before 24 Nov 2026● Re-checked 12 Oct 2026 · 126 facts · 0 corrections · 3 unconfirmedSource: System Card: Claude Opus 4.5 (153 pp)

Use it via API

$2,940 /month

$58.80 per 1K requests

RAG over docs: 12K in · 600 out · 50K requests/mo · 30% cached · change

Code example Compare

Where to call it

Claude APIclaude-opus-4-5-20251101
Amazon Bedrockanthropic.claude-opus-4-5-20251101-v1:0
Google Vertex AIclaude-opus-4-5@20251101
Microsoft Foundry / Azureclaude-opus-4-5

Supports

Image input
PDF input
Structured outputs
Reasoning control
Tool calling
Web search
Prompt caching
Batch API

Full feature support

Good for

Software engineering (SWE-bench Verified 80.9%)
Agentic tasks that run autonomously for a user (τ²-bench, MCP Atlas)
Tool use and computer use (OSWorld 66.3%)

Replaced by

Claude Opus 5.5$4.00 / $20.00

This model: $5.00 / $25.00 per 1M tokens

Compare side by side

Overview

Anthropic · 12Opus

Opus 4.5

Intelligent, efficient, and the best model in the world for coding, agents, and computer use

Cost: $5.00 in
Context: 200K

Input / output: $5.00 / $25.00
Max output: 64K
Knows up to: May 2025
Released: 24 Nov 2025

A frontier model whose strongest areas are software engineering and tool and computer use; state of the art among frontier models on coding and agentic tasks at release, with gains in reasoning, maths and vision. Deployed under the ASL-3 Standard. p.3, p.8

claude-opus-4-5-20251101

Input / output per 1M: $5.00 / $25.00
Context window: 200K
Max output: 64K
Knows up to: May 2025
Reasoning: Extended
Weights: Closed

About this card. A model card is the maker's own account of a model: what it's for, how it was trained and tested, and where it falls short. This page condenses Anthropic's System Card: Claude Opus 4.5. Every claim carries its source page.