Claude Opus 4.5
Anthropic's most capable model. Exceptional across reasoning, coding, creative writing, and nuanced instruction following.
Specifications
| Lab | Anthropic |
|---|---|
| Context window | 200K tokens |
| Input price | $5.00/1M |
| Output price | $25.00/1M |
| Release | Nov 2025 |
Strengths
- Best-in-class reasoning depth
- Superior coding ability
- Excellent instruction following
- Strong multilingual performance
- Nuanced creative writing
Weaknesses
- Higher latency than smaller models
- Premium pricing tier
- Rate limits on API
Best for
- Complex reasoning tasks
- Code generation & review
- Long-form content
- Research analysis
In Depth: Claude Opus 4.5
Summary
Claude Opus 4.5 is an AI model from Anthropic.
Released in Nov 2025. It currently appears in the Overall category on LMRank. It takes text input and produces text output, with a context window of 200K tokens. Input pricing is $5.00 per 1M tokens and output is $25.00 per 1M tokens on OpenRouter.