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feat: Support Magistral Small 2509 reasoning tags #6474

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opened 2025-11-11 16:56:20 -06:00 by GiteaMirror · 2 comments
GiteaMirror commented 2025-11-11 16:56:20 -06:00
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Originally created by @MattBash17 on GitHub (Sep 23, 2025).

Check Existing Issues

  • I have searched the existing issues and discussions.

Problem Description

Magistral 2509 generates internal reasoning between the [THINK]...[/THINK] tags, instead of the common ... ones. Would it be possible to add support for the correct visualization in the UI?

Desired Solution you'd like

A correct reasonining visualization in the UI, or the option to specify the reasoning section parsing (per model) like LM Studio does.

Alternatives Considered

No response

Additional Context

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Originally created by @MattBash17 on GitHub (Sep 23, 2025). ### Check Existing Issues - [x] I have searched the existing issues and discussions. ### Problem Description Magistral 2509 generates internal reasoning between the [THINK]...[/THINK] tags, instead of the common <think>...</think> ones. Would it be possible to add support for the correct visualization in the UI? ### Desired Solution you'd like A correct reasonining visualization in the UI, or the option to specify the reasoning section parsing (per model) like LM Studio does. ### Alternatives Considered _No response_ ### Additional Context _No response_
GiteaMirror commented 2025-11-11 16:56:21 -06:00
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@tjbck commented on GitHub (Sep 23, 2025):

You should be able to specify custom reasoning tags!

@tjbck commented on GitHub (Sep 23, 2025): You should be able to specify custom reasoning tags!
GiteaMirror commented 2025-11-11 16:56:21 -06:00
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@kermorvan commented on GitHub (Sep 28, 2025):

Solution

  • Click the User icon (top right corner) > Settings > Admin Settings (bottom left of "Settings" popup) > Models > hf.co/unsloth/Magistral-Small-2509-GGUF:UD-Q3_K_XL > Advanced Params (Show) > Reasoning Tags

  • Change from "Default" to [THINK] and [/THINK]

  • Save & Update

@kermorvan commented on GitHub (Sep 28, 2025): ## Solution - Click the User icon (top right corner) > Settings > Admin Settings (bottom left of "Settings" popup) > Models > hf.co/unsloth/Magistral-Small-2509-GGUF:UD-Q3_K_XL > Advanced Params (Show) > Reasoning Tags - Change from "Default" to [THINK] and [/THINK] - Save & Update
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Reference: github-starred/open-webui#6474