# Cosine Similarity Script Search does not work

**URL:** <https://discuss.elastic.co/t/cosine-similarity-script-search-does-not-work/257550>\
**Category:** Elasticsearch\
**Created:** [December 3, 2020, 4:37pm UTC](https://discuss.elastic.co/t/cosine-similarity-script-search-does-not-work/257550 "2020-12-03T16:37:53Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![gustav\_z](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/gustav_z/32/80202_2.png) [@gustav\_z](https://discuss.elastic.co/u/gustav_z)\
**Post date:** [December 3, 2020, 4:37pm UTC](https://discuss.elastic.co/t/cosine-similarity-script-search-does-not-work/257550/1 "2020-12-03T16:37:54Z")

</div>

Similar to these un-answered and closed topics:

- [Cosine similarity not working in elastic search](https://discuss.elastic.co/t/cosine-similarity-not-working-in-elastic-search/209702)
- [Elasticsearch Search error](https://discuss.elastic.co/t/elasticsearch-search-error/232784)

I am seeing the same Error on the python client when trying to reproduce cosine similarity script search on text-embeddings as explained in this blogpost:

- [https://www.elastic.co/blog/text-similarity-search-with-vectors-in-elasticsearch](https://www.elastic.co/blog/text-similarity-search-with-vectors-in-elasticsearch)

Query (where `query_vector` is a list of floats of length 512):

```auto
query = {
                    "script_score": {
                        "query": {"match_all": {}},
                        "script": {
                            "source": "cosineSimilarity(params.query_vector, doc['my_dense_vector']) + 1.0",
                            "params": {"query_vector": query_vector}
                        }
                    }}

```

Request:

```auto
res = es.search(index=INDEX_NAME, body={"size": QUERY_SIZE,"query": query})

```

Error:

```auto
RequestError: RequestError(400, 'search_phase_execution_exception', 'runtime error')

```

---

<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:** [December 31, 2020, 4:38pm UTC](https://discuss.elastic.co/t/cosine-similarity-script-search-does-not-work/257550/2 "2020-12-31T16:38:12Z")

</div>

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