GPT-OSS Not Working Properly

[Kynson]

Checks

• I have searched existing issues and discussions
• I can reproduce this with the latest main or release

Describe the bug

Osaurus is not handling response from GPT-OSS correctly:

• Reasoning token is not handled (shown as <|channel|>analysis<|message|> ...)
• Returns error in subsequent interactions: Error: The operation couldn’t be completed. (Jinja.TemplateException error 1.)

Steps to reproduce

1. Download gpt-oss-20b-mlx-8bit
2. Start chat
3. Type any prompt

Osaurus version / commit

v0.6.1

macOS version

26.1 Tahoe (25B78)

Apple Silicon chip

Apple M4 Max

Xcode version

Version 26.2 (17C52)

Logs

N/A

Screenshots