Anthropic: Claude Opus 4.5

Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use.

Context
200K
Max output
64K
Input price
$5/1M tokens
Output price
$25/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode

Details

Model IDanthropic/claude-opus-4.5
Provider OpenRouter
Creator Anthropic
Familyclaude-opus
License—
Status—
Typechat
Input modalitiesimage, text
Output modalitiestext
Open weight—
Parameters—
Architecture—
Context window200K tokens
Max input—
Max output64K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$5
Output
$25
Cache write
—
Cache read
$0.5
Batch in
—
Batch out
—

Family Comparison: claude-opus

ModelContextMax outPricing
Anthropic: Claude Opus 5.5 (batch)1M128K$2$10
Anthropic: Claude Opus 4.5 (batch)200K64K$2.5$12.5
Anthropic: Claude Opus 4.6 (batch)1M128K$2.5$12.5
Anthropic: Claude Opus 4.7 (batch)1M128K$2.5$12.5
Anthropic: Claude Opus 4.8 (batch)1M128K$2.5$12.5
Anthropic: Claude Opus 5 (batch)1M128K$2.5$12.5
Anthropic: Claude Opus Latest1M128K$4$20
Anthropic: Claude Opus 5.51M128K$4$20
Anthropic: Claude Opus 4.5200K64K$5$25
Anthropic: Claude Opus 4.61M128K$5$25
Anthropic: Claude Opus 4.71M128K$5$25
Anthropic: Claude Opus 4.81M128K$5$25
Anthropic: Claude Opus 51M128K$5$25
Anthropic: Claude Opus 4.1 (batch)200K32K$7.5$37.5
Anthropic: Claude Opus 4.8 (Fast)1M128K$10$50
Claude Opus 5 (Fast)1M128K$10$50
Anthropic: Claude Opus 4.1200K32K$15$75
Anthropic: Claude Opus 4200K32K$15$75
Anthropic: Claude Opus 4.6 (Fast)1M128K$30$150
Anthropic: Claude Opus 4.7 (Fast)1M128K$30$150

API

GET/v1/models/openrouter/anthropic/claude-opus-4.5