I have searched the existing issues and discussions.
Problem Description
Bytedance Seed-OSS uses new tags to delimit its reasoning: <seed:think>, </seed:think>. Open WebUI doesn't parse this, so the thinking isn't separated.
Desired Solution you'd like
Open WebUI recognizes <seed:think></seed:think> as <think></think> tags.
Alternatives Considered
No response
Additional Context
No response
Originally created by @bgreene2 on GitHub (Aug 23, 2025).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/16856
### Check Existing Issues
- [x] I have searched the existing issues and discussions.
### Problem Description
[Bytedance Seed-OSS](https://huggingface.co/ByteDance-Seed/Seed-OSS-36B-Instruct) uses new tags to delimit its reasoning: `<seed:think>`, `</seed:think>`. Open WebUI doesn't parse this, so the thinking isn't separated.
### Desired Solution you'd like
Open WebUI recognizes `<seed:think></seed:think>` as `<think></think>` tags.
### Alternatives Considered
_No response_
### Additional Context
_No response_
<!-- gh-comment-id:3218534668 -->
@silentoplayz commented on GitHub (Aug 25, 2025):
A related PR has been opened - https://github.com/open-webui/open-webui/pull/16880
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Originally created by @bgreene2 on GitHub (Aug 23, 2025).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/16856
Check Existing Issues
Problem Description
Bytedance Seed-OSS uses new tags to delimit its reasoning:
<seed:think>,</seed:think>. Open WebUI doesn't parse this, so the thinking isn't separated.Desired Solution you'd like
Open WebUI recognizes
<seed:think></seed:think>as<think></think>tags.Alternatives Considered
No response
Additional Context
No response
@silentoplayz commented on GitHub (Aug 25, 2025):
A related PR has been opened - https://github.com/open-webui/open-webui/pull/16880
@tjbck commented on GitHub (Aug 26, 2025):
Closing in favour of #16930