Title: Response API vs Chat Completion – problem
Last modified: March 18, 2026

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# Response API vs Chat Completion – problem

 *  [marksten70](https://wordpress.org/support/users/marksten70/)
 * (@marksten70)
 * [3 weeks, 5 days ago](https://wordpress.org/support/topic/response-api-vs-chat-completion-problem/)
 * Hi everyone
 * I have a site, that i need to troubleshoot. Meow -> AI Engine is installed, and
   has worked fine since release, as far as I know. Now we are seeing an error code
   about Azure trying to find Response API URL which doesn’t exist. The deployment
   used is not set up with a Response API., just Chat Completions. This is what 
   it looks like in WP:
 * ![](https://i0.wp.com/site.uit.no/lederintro/wp-content/uploads/sites/526/2026/
   03/Screenshot-2026-03-18-at-12.54.44.png?ssl=1)
 * ![](https://i0.wp.com/site.uit.no/lederintro/wp-content/uploads/sites/526/2026/
   03/Screenshot-2026-03-18-at-13.03.07.png?ssl=1)
 * What I don’t know is where or how to fix the error I get. Apparently the model
   used does not support Responses API. Does anyone see/know/guess the issue here?
 * As I said, it has worked before, and only the last couple of weeks it has been
   down…
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fresponse-api-vs-chat-completion-problem%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 4 replies - 1 through 4 (of 4 total)

 *  Plugin Author [Jordy Meow](https://wordpress.org/support/users/tigroumeow/)
 * (@tigroumeow)
 * [3 weeks, 4 days ago](https://wordpress.org/support/topic/response-api-vs-chat-completion-problem/#post-18856174)
 * Hello [@marksten70](https://wordpress.org/support/users/marksten70/),
 * Thanks for the screenshots. I can see a couple of issues:
    1. Missing API Key
       Your API Key field is empty in the environment settings. This
       is required for authentication, so without it, no requests will succeed.
    2. Non-standard endpoint
       Your endpoint (chat.uit.no) doesn’t look like a standard
       Azure OpenAI endpoint (those look like yourresource.openai.azure.com).
    3. Responses API mismatch
       In a recent update, GPT-4o Mini was tagged to use OpenAI’s
       newer Responses API, which changes the URL path to /v1/responses. Your endpoint
       likely only supports the Chat Completions path (/chat/completions), which is
       why it worked before and broke recently.
 * Instead of selecting “GPT-4o Mini” from the dropdown in your deployment, manually
   type a custom name (e.g. gpt-4o-mini-custom). This way AI Engine won’t match 
   the responses tag and will fall back to the Chat Completions API.
   I hope it helps!
   ☺️Jordy.
 *  Thread Starter [marksten70](https://wordpress.org/support/users/marksten70/)
 * (@marksten70)
 * [3 weeks, 4 days ago](https://wordpress.org/support/topic/response-api-vs-chat-completion-problem/#post-18856334)
 * Oh… Thank you for response. I will indeed try what you suggest. PS: I blanked
   out the API-key on pupose, so it didn’t show here 🙂
 *  Thread Starter [marksten70](https://wordpress.org/support/users/marksten70/)
 * (@marksten70)
 * [3 weeks, 4 days ago](https://wordpress.org/support/topic/response-api-vs-chat-completion-problem/#post-18856350)
 * Hmm… I don’t seem to be able to write any custom text, like you suggest instead
   of choosing from drop-down menu. Am I in the right place?
 * ![](https://i0.wp.com/site.uit.no/lederintro/wp-content/uploads/sites/526/2026/
   03/Screenshot-2026-03-19-at-09.27.40-1.png?ssl=1)
    -  This reply was modified 3 weeks, 4 days ago by [marksten70](https://wordpress.org/support/users/marksten70/).
 *  Thread Starter [marksten70](https://wordpress.org/support/users/marksten70/)
 * (@marksten70)
 * [3 weeks, 4 days ago](https://wordpress.org/support/topic/response-api-vs-chat-completion-problem/#post-18856885)
 * [@tigroumeow](https://wordpress.org/support/users/tigroumeow/) Just to clarify.
   We don’t use OpenAI as endpoint, it just looks like that. Out Uni has a locally
   setup based on ChatGPT – ChatUiT, which is hosted from that url. As mentioned
   it has been working, and your answer tells us what the problem is. I have been
   unable to figure out where to write in a custom model text, like you suggesed

Viewing 4 replies - 1 through 4 (of 4 total)

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## Tags

 * [api](https://wordpress.org/support/topic-tag/api/)
 * [error code](https://wordpress.org/support/topic-tag/error-code/)
 * [model](https://wordpress.org/support/topic-tag/model/)
 * [url](https://wordpress.org/support/topic-tag/url/)

 * 4 replies
 * 2 participants
 * Last reply from: [marksten70](https://wordpress.org/support/users/marksten70/)
 * Last activity: [3 weeks, 4 days ago](https://wordpress.org/support/topic/response-api-vs-chat-completion-problem/#post-18856885)
 * Status: not resolved