# Is header semantic search still experimental?
**URL:** https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864
**Category:** Support
**Tags:** ai, ai-search
**Created:** [October 14, 2024, 8:23pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864 "2024-10-14T20:23:09Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@MarcP](https://meta.discourse.org/u/MarcP)
#### Post date: [October 14, 2024, 8:23pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/1 "2024-10-14T20:23:09Z")
> [@Semantic quick search gives error 500](https://meta.discourse.org/t/semantic-quick-search-gives-error-500/302545/2):
>
> That’s an experimental feature that requires you to enable per post embeddings and to use a re-ranker model, which we are still evaluating the feasibility of. I will move this setting to a hidden one so people don’t enable it by mistake.
I am getting the same issue, however, is the above still applicable? I am still getting the error from the linked topic.
_Ps. Why is “Reply as Linked Topic” not available on closed topics? Would totally make sense. 🤔_
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [October 14, 2024, 8:32pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/2 "2024-10-14T20:32:10Z")
> [@MarcP](#):
>
> I am still getting the error from the linked topic.
Getting an error here?
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### Author:  [@MarcP](https://meta.discourse.org/u/MarcP)
#### Post date: [October 14, 2024, 8:33pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/3 "2024-10-14T20:33:42Z")
Failed to process hijacked response correctly : ArgumentError : address cannot be nil or empty
When I do an AI search - my issue is 1:1 with the topic I linked.
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [October 14, 2024, 8:54pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/4 "2024-10-14T20:54:36Z")
I mean, where is this happening, here on Meta or in your site?
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### Author:  [@MarcP](https://meta.discourse.org/u/MarcP)
#### Post date: [October 14, 2024, 8:56pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/5 "2024-10-14T20:56:56Z")
Ah no, on my own instance. I’m not sure if I ever seen it work over there.
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [October 14, 2024, 9:08pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/6 "2024-10-14T21:08:58Z")
Oh it won’t work out of the box indeed, as it requires deployment of a re-reranker model and enabling per post embeddings.
One of the hurdles with per post embeddings is the storage cost associated with it, and we just made a big advance there via [FEATURE: Index embeddings using bit vectors (#824) · discourse/discourse-ai@791fad1 · GitHub](https://github.com/discourse/discourse-ai/commit/791fad1e6ac974d9280b31d19752f24810235157).
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### Author:  [@MarcP](https://meta.discourse.org/u/MarcP)
#### Post date: [October 14, 2024, 9:10pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/7 "2024-10-14T21:10:50Z")
> [@Falco](#):
>
> Oh it won’t work out of the box indeed, as it requires deployment of a re-reranker model and enabling per post embeddings.
I know, I’ve followed every tutorial I could find on this. Not using self hosted models, just OpenAI.
- [Discourse AI - Embeddings](https://meta.discourse.org/t/discourse-ai-embeddings/259603)
- [Enabling AI search](https://meta.discourse.org/t/enabling-ai-search/282420)
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### Author:  [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [October 14, 2024, 9:46pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/8 "2024-10-14T21:46:33Z")
That is why it is a hidden experimental setting 😄
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### Author:  [@MarcP](https://meta.discourse.org/u/MarcP)
#### Post date: [October 14, 2024, 9:51pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/9 "2024-10-14T21:51:41Z")
Well that was actually my question (see topic title), thanks.
Confusion arises because there is no hidden setting. As I recall, this should be set in app.yml and below is the only hidden setting that’s not commented out.
tldr; I was able to follow above mentioned guides without “unhiding” anything.. just checking boxes in settings.
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### Author:  [@David\_Ghost](https://meta.discourse.org/u/David_Ghost)
#### Post date: [October 14, 2024, 9:54pm UTC](https://meta.discourse.org/t/is-header-semantic-search-still-experimental/330864/10 "2024-10-14T21:54:57Z")
I saw a “quick search” here. Is it supposed to work like the instant search experiment? 😮