Claude 4Released 2025-05-14
Claude Opus 4
Previous generation flagship for complex tasks
Family
Claude 4
Release Date
2025-05-14
Best For
Legacy complex analysis, research, creative writing
Overview
Claude Opus 4 was the flagship model of the Claude 4 generation. It remains available for existing integrations and excels at nuanced reasoning, multi-step planning, creative writing, and expert-level analysis. With a 200K context window and 32K max output, it handles extensive documents and complex tasks.
Pricing
Input / 1M tokens
$15.00
Output / 1M tokens
$75.00
Context Window
200K
Max Output
32K
API model ID:
claude-opus-4Key Features
✓High capability for complex reasoning and analysis
✓200K token context window
✓32K token max output
✓Strong performance on math, coding, and scientific tasks
✓Multi-step planning and agentic capabilities
✓Excellent at following nuanced instructions
Use Cases
Complex research and analysis requiring deep reasoning
Long-form creative writing and content generation
Expert-level code architecture and system design
Legal, medical, and financial document analysis
Benchmarks
| Benchmark | Score |
|---|---|
| Graduate-Level Reasoning (GPQA) | 79.7% |
| Coding (SWE-bench Verified) | 43.2% |
| MMLU (5-shot) | 89.8% |
| HumanEval (Python) | 92.0% |