@ai-sdk/azure defaults to completions api instead of responses #9035

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1. OmarMcAdam

   added

   bugSomething isn't workingSomething isn't working

   on Jan 17, 2026
2. github-actions

   assigned

   thdxr

   on Jan 17, 2026
3. github-actions commented on Jan 17, 2026

   

   github-actionsBot

   on Jan 17, 2026 – with GitHub Actions

   Contributor

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   This issue might be a duplicate of existing issues. Please check:

   • gpt-5.2-codex TypeError: sdk.responses is not a function. (In 'sdk.responses(modelID)', 'sdk.responses' is undefined) #8622: gpt-5.2-codex TypeError: sdk.responses is not a function - Same model with similar API routing issue manifesting as a different error
   • Azure OpenAI need to change completions -> responses #7180: Azure OpenAI need to change completions -> responses - Exact same root cause (Azure endpoint routing) and same fix needed
   • [BUG]: GitHub Copilot Responses API routing for GPT-5+ #5866: [BUG]: GitHub Copilot Responses API routing for GPT-5+ - Related Responses API routing issue affecting similar models

   Feel free to ignore if none of these address your specific case.
4. OmarMcAdam commented on Jan 17, 2026

   

   OmarMcAdam

   on Jan 17, 2026

   Author

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   using azure as providerId instead of azure-openai resolves the issue
5. OmarMcAdam

   closed this as completedon Jan 17, 2026
6. JoaoCP13 commented on Jan 20, 2026

   

   JoaoCP13

   on Jan 20, 2026

   Last edited by JoaoCP13

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   I'm having the same problem. I'm trying to use gpt-5.1-codex and it works when I run opencode on my local machine, but when I try to run it on a gitlab ci pipeline with the same configurations (same opencode.jsonc and variables) it always fails with the error The chatCompletion operation does not work with the specified model, gpt-5.1-codex. Please choose different model and try again. You can learn more about which models can be used with each operation here: https://go.microsoft.com/fwlink/?linkid=2197993. I tried with opencode versions 1.1.23 and 1.1.26. This is the opencode.jsonc I am using

   {
     "$schema": "https://opencode.ai/config.json",
     "model": "azure/gpt-5.1-codex",
     "provider": {
       "azure": {
         "options": {
           "apiKey": "{env:AZURE_OPENAI_API_KEY}",
           "resourceName": "{env:AZURE_OPENAI_RESOURCE_NAME}",
         },
         "models": {
           "gpt-5.1-codex": {
             "name": "gpt-5.1-codex",
             "id": "{env:AZURE_OPENAI_DEPLOYMENT_NAME}"
           }
         }
       }
     }
   }
   

   I also added the useCompletionUrls option to false but didn't make any difference, it always resolve to the chatCompletion.

   Can you please help me? Thank you in advance

   👍React with 👍2Reacted by Cezary Klus and Frank D. Holzwarth
7. CezaryKlus commented on Jan 27, 2026

   

   CezaryKlus

   on Jan 27, 2026

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   I experience the same behavior when running from VS Code devcontainer