Claude Opus 4.5 Thinking API

anthropic/claude-opus-4.5-thinking
by Anthropicrelease date: 11/23/2025

Claude Opus 4.5 Thinking is Anthropic's flagship LLM for advanced reasoning, coding, automation, and enterprise tasks, featuring SOTA multitask abilities.

$2.5/$12.5per 1M tokens
API documentation not available

Technical Specs

Context Length200,000
Release Date11/23/2025
Input Formats
textimage
Output Formats
text

Capabilities & Features

Capabilities
advanced language understandingcomplex code generation and software engineeringmulti step logical reasoningAI agent and automation workflowsextended document analysis (Excel, PowerPoint, PDFs)computer vision/multimodal analysisthought process output (chain of-thought reasoning)customizable reasoning effort (effort parameter)robust context and long document handlingenhanced computer use (with zoom tool)secure and reliable (Constitutional AI/harm reduction)API, batch, and enterprise integrations
Supported File Types
.jpg.png.pdf.docx.xlsx.pptx