"Does Claude work well in Korean?" is often the first thing Korean users check. The answer: yes, Claude supports Korean input and output. This guide covers how to use Korean, how it compares to English, and tips to get better results — sticking to verified facts.
Does Claude support Korean?
Yes. Ask in Korean and Claude answers in Korean. Translation, summarization, writing, code explanation, document analysis — most tasks work in Korean. There's no language setting to flip; just type in Korean.
Anthropic provides a Korean version of its website and pricing page (claude.com/ko), and has publicly announced a Representative Director for Korea and plans to open a Seoul office.
Is it different from using English?
Large language models generally perform most reliably in English, which has the most training data. Claude handles Korean naturally, but in highly specialized domains or subtle nuance you may notice a difference versus English. There is no official standardized metric we can cite for an exact quantitative comparison, so this guide does not assert one.
Practical tip: work in Korean but include the original (English) for key terms and proper nouns to reduce ambiguity. For translation, specifying criteria like "literal vs. natural" or "formal vs. casual" improves results.
Tips for getting better Korean results
- Give context first — who it's for and the purpose, so tone and depth match.
- Specify the format — table, list, step-by-step, etc.
- Show an example — one or two samples of the style you want.
- Break it up — splitting a big task into steps raises accuracy.
Note: we could not find an official standardized figure for a Korean-vs-English performance gap. The "English tends to be more reliable" point is based on general LLM behavior, and the perceived difference varies by task.