Introduction to Claude Opus

Claude Opus is Anthropic's most capable AI model, designed to deliver state-of-the-art performance on highly complex tasks. It represents a significant leap forward in reasoning, math, coding, and multilingual understanding.

Why "Opus"?

The name "Opus" signifies a masterpiece or a work of significant scale. It sits at the top of the Claude 3 model family:

Haiku: Fastest, most cost-effective.
Sonnet: Balanced performance and speed.
Opus: Maximum intelligence and capability.

Key Capabilities

1. Near-Human Reasoning

Opus demonstrates undergraduate and graduate-level reasoning on standard benchmarks (MMLU, GPQA), often outperforming GPT-4 in zero-shot scenarios.

2. 200k Token Context

With a massive context window, Opus can:

Analyze entire books or long legal documents.
Understand complex codebases.
Recall information from long conversations with high accuracy.

3. Fewer Hallucinations

Anthropic has improved truthfulness, meaning Opus is twice as likely to answer correctly and admit when it doesn't know the answer compared to previous models.

Best Use Cases

Research & Analysis Synthesizing trends from multiple complex reports.

Creative Writing Generating nuanced, high-quality prose with distinct tone.

Coding Solving difficult engineering problems and refactoring legacy code.

Strategy Business planning and higher-order logic tasks.

Getting Started

To use Claude Opus, you can:

Subscribe to Claude Pro on claude.ai.
Access the Anthropic API (for developers).

"Opus allows us to automate tasks that previously required human domain experts." — Early Beta Tester