[GH-ISSUE #17131] issue: Global Advanced Params Disable GPT 5 #105173

New Issue

GiteaMirror · 2026-05-18T03:03:28-05:00

GiteaMirror commented

2026-05-18 03:03:28 -05:00

Originally created by @98h398hrpohpoai on GitHub (Sep 1, 2025).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/17131

Check Existing Issues

I have searched the existing issues and discussions.
I am using the latest version of Open WebUI.

Installation Method

Docker

Open WebUI Version

v0.6.26

Ollama Version (if applicable)

No response

Operating System

Docker

Browser (if applicable)

No response

Confirmation

I have read and followed all instructions in README.md.
I am using the latest version of both Open WebUI and Ollama.
I have included the browser console logs.
I have included the Docker container logs.
I have provided every relevant configuration, setting, and environment variable used in my setup.
I have clearly listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc).
I have documented step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation. My steps:
Start with the initial platform/version/OS and dependencies used,
Specify exact install/launch/configure commands,
List URLs visited, user input (incl. example values/emails/passwords if needed),
Describe all options and toggles enabled or changed,
Include any files or environmental changes,
Identify the expected and actual result at each stage,
Ensure any reasonably skilled user can follow and hit the same issue.

Expected Behavior

All available models can still be used when changing global params.

Actual Behavior

Changing global parameters disables certain models like gpt-5 that do not accept the modified arguments

Steps to Reproduce

Set a custom value under Settings → Advanced Parameters i.e. num_ctx to 8192.

Logs & Screenshots

gpt-5 responds with:
Unrecognized request argument supplied: num_ctx

Additional Information

Seems an option to exclude certain models from global configs would resolve this.

Changing model settings directly does not resolve this as "Default" loads global config, and setting any custom value results in the same error due to passing the argument at the new value (even if it's the original/built-in default).

Originally created by @98h398hrpohpoai on GitHub (Sep 1, 2025). Original GitHub issue: https://github.com/open-webui/open-webui/issues/17131 ### Check Existing Issues - [x] I have searched the existing issues and discussions. - [x] I am using the latest version of Open WebUI. ### Installation Method Docker ### Open WebUI Version v0.6.26 ### Ollama Version (if applicable) _No response_ ### Operating System Docker ### Browser (if applicable) _No response_ ### Confirmation - [x] I have read and followed all instructions in `README.md`. - [x] I am using the latest version of **both** Open WebUI and Ollama. - [x] I have included the browser console logs. - [x] I have included the Docker container logs. - [x] I have **provided every relevant configuration, setting, and environment variable used in my setup.** - [x] I have clearly **listed every relevant configuration, custom setting, environment variable, and command-line option that influences my setup** (such as Docker Compose overrides, .env values, browser settings, authentication configurations, etc). - [x] I have documented **step-by-step reproduction instructions that are precise, sequential, and leave nothing to interpretation**. My steps: - Start with the initial platform/version/OS and dependencies used, - Specify exact install/launch/configure commands, - List URLs visited, user input (incl. example values/emails/passwords if needed), - Describe all options and toggles enabled or changed, - Include any files or environmental changes, - Identify the expected and actual result at each stage, - Ensure any reasonably skilled user can follow and hit the same issue. ### Expected Behavior All available models can still be used when changing global params. ### Actual Behavior Changing global parameters disables certain models like gpt-5 that do not accept the modified arguments ### Steps to Reproduce Set a custom value under Settings → Advanced Parameters i.e. num_ctx to 8192. ### Logs & Screenshots gpt-5 responds with: Unrecognized request argument supplied: num_ctx ### Additional Information Seems an option to exclude certain models from global configs would resolve this. Changing model settings directly does not resolve this as "Default" loads global config, and setting any custom value results in the same error due to passing the argument at the new value (even if it's the original/built-in default).

GiteaMirror added the bug label 2026-05-18 03:03:28 -05:00

GiteaMirror closed this issue

2026-05-18 03:03:29 -05:00

GiteaMirror commented

2026-05-18 03:03:31 -05:00

@tjbck commented on GitHub (Sep 1, 2025):

Intended behaviour.

@tjbck commented on GitHub (Sep 1, 2025): Intended behaviour.

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Reference: github-starred/open-webui#105173