# The \[dot\_product\] similarity can only be used with unit-length vectors. Preview of invalid vector: \[-1.8447683, 0.20424768, 0.53359556, 1.1610416, 0.905799, ...\]

**URL:** <https://discuss.elastic.co/t/the-dot-product-similarity-can-only-be-used-with-unit-length-vectors-preview-of-invalid-vector-1-8447683-0-20424768-0-53359556-1-1610416-0-905799/334566>\
**Category:** Elasticsearch\
**Tags:** vector-search\
**Created:** [May 29, 2023, 9:13am UTC](https://discuss.elastic.co/t/the-dot-product-similarity-can-only-be-used-with-unit-length-vectors-preview-of-invalid-vector-1-8447683-0-20424768-0-53359556-1-1610416-0-905799/334566 "2023-05-29T09:13:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![zheng\_zhiqiang](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/zheng_zhiqiang/32/121535_2.png) [@zheng\_zhiqiang](https://discuss.elastic.co/u/zheng_zhiqiang)\
**Post date:** [May 29, 2023, 9:13am UTC](https://discuss.elastic.co/t/the-dot-product-similarity-can-only-be-used-with-unit-length-vectors-preview-of-invalid-vector-1-8447683-0-20424768-0-53359556-1-1610416-0-905799/334566/1 "2023-05-29T09:13:20Z")

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I create a deployment in elastic cloud with reference [ChatGPT and Elasticsearch: OpenAI meets private data](https://www.elastic.co/cn/blog/chatgpt-elasticsearch-openai-meets-private-data).

The only difference is that I chose a Chinese model for machine learning. However, I encountered the following error while web scraping.

```auto
The [dot_product] similarity can only be used with unit-length vectors. Preview of invalid vector: [-1.8447683, 0.20424768, 0.53359556, 1.1610416, 0.905799, ...]

```

Any one knows what can i do to fix it? Thanks.

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 26, 2023, 9:13am UTC](https://discuss.elastic.co/t/the-dot-product-similarity-can-only-be-used-with-unit-length-vectors-preview-of-invalid-vector-1-8447683-0-20424768-0-53359556-1-1610416-0-905799/334566/2 "2023-06-26T09:13:39Z")

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