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Unknown parameter: 'reasoningSummary' with GPT-5 on Azure #27716
Description
Description
Can't prompt anymore since v1.14.51. Worked with v1.14.50.
Unknown parameter: 'reasoningSummary'.
Plugins
OpenCode version
v1.15.0
Steps to reproduce
- Use it with GPT-5.1 on Azure
- Prompt anything
Probably related to #22350, #22351, #21237
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Operating System
Windows 11
Terminal
Windows Terminal
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rekram1-node commentedon May 15, 2026
Are u using responses api or completions api? And u said it's w/ gpt-5.1? Not gpt-5.5?
micheljung commentedon May 18, 2026
Hi @rekram1-node , thanks for checking back.
I assume the responses API? My
opencode.json:{ "$schema": "https://opencode.ai/config.json", "provider": { "my-gpt": { "name": "MyGPT", "npm": "@ai-sdk/openai-compatible", "options": { "baseURL": "http://my-corporate-proxy/openai/deployments/gpt-5.1/" }, "models": { "gpt-5.1": { "name": "GPT-5.1" } } } } }Then I just start opencode, type something, press enter.
rekram1-node commentedon May 20, 2026
ur using the completions api since it is openai compatible pkg, ill take a look
bertrandgressier commentedon Jun 2, 2026
I have same issue, I'm waiting a patch for this issue, all gpt5 model is not working on azure
dylanwe commentedon Jun 2, 2026
I also have this issue when working with GPT 5 Azure models
dylanwe commentedon Jun 2, 2026
@bertrandgressier this PR broke it #26819 and rekram1-node also has a recent comment in there with a small update #26819 (comment).
rekram1-node commentedon Jun 4, 2026
u can always mitigate these things by overriding fetch implementations via plugins but ill fix this tmr
is everyone using azure directly or are these custom providers? Or is this litellm
extra context helps so ic an fix it for all of u
ar27111994 commentedon Jun 4, 2026
@rekram1-node I've encountered this on both Azure directly & on a custom provider. Not sure about LiteLLM, as I believe it had a security breach some time ago, so I haven't tried setting it up after that.
ovstetun commentedon Jun 4, 2026
I have this issue using litellm - so a fix would be great :)
AlexHird commentedon Jun 4, 2026
Have the same issue using Azure Foundry
rekram1-node commentedon Jun 4, 2026
cool ty