Claude Sonnet 4
Anthropic's balanced model. Offers most of Opus's capability at significantly lower latency and cost.
Specifications
| Lab | Anthropic |
|---|---|
| Context window | 200K tokens |
| Input price | $3.00/1M |
| Output price | $15.00/1M |
| Release | May 2025 |
Strengths
- Excellent instruction following
- Strong coding ability
- Good reasoning
- Fast inference
- Competitive pricing
Weaknesses
- Creative depth below Opus
- Long-form writing less nuanced
Best for
- Day-to-day coding
- Customer-facing chat
- Content drafting
- General productivity
In Depth: Claude Sonnet 4
Summary
Claude Sonnet 4 is an AI model from Anthropic.
Released in May 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 $3.00 per 1M tokens and output is $15.00 per 1M tokens on OpenRouter.