Claude 4.5Released 2025-11-20
Claude Opus 4.5
High-capability reasoning model with same pricing as Opus 4.6
Family
Claude 4.5
Release Date
2025-11-20
Best For
Complex reasoning, analysis, professional collaboration
Overview
Claude Opus 4.5 delivers top-tier reasoning and coding capabilities at the same price point as Opus 4.6. It excels at nuanced analysis, multi-step planning, and professional-grade content generation. With a 200K context window, it handles extensive documents and complex tasks with ease.
Pricing
Input / 1M tokens
$5.00
Output / 1M tokens
$25.00
Context Window
200K
Max Output
32K
API model ID:
claude-opus-4-5Key Features
✓Same pricing as Opus 4.6 at $5/$25 per MTok
✓200K token context window
✓32K token max output
✓Strong reasoning and coding capabilities
✓Excellent at following nuanced instructions
✓Advanced multi-step planning capabilities
Use Cases
Complex research and analysis
Long-form content generation
Professional document drafting
Code architecture and system design
Multi-step planning and strategy
Benchmarks
| Benchmark | Score |
|---|---|
| Graduate-Level Reasoning (GPQA) | 83.5% |
| Coding (SWE-bench Verified) | 49.1% |
| MMLU (5-shot) | 91.2% |
| TAU-bench (Tool Use) | 59.8% |