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[GH-ISSUE #10411] ❗ Bug: ModelModel Not JSON Serializable in OpenWebUI v0.5.14 #54550

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opened 2026-05-05 16:24:08 -05:00 by GiteaMirror · 1 comment
GiteaMirror commented 2026-05-05 16:24:08 -05:00
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Originally created by @samuelpetermoshi on GitHub (Feb 20, 2025).
Original GitHub issue: https://github.com/open-webui/open-webui/issues/10411

Description:
After updating to OpenWebUI v0.5.14, I encountered an issue where the API throws a Connection error: Object of type ModelModel is not JSON serializable. This appears when making requests to retrieve available models.

This issue affects the monitoring pipelines for the built-in OpenAI and Ollama models. Due to the error, their data is not being sent to the following monitoring pipelines:

  1. Datadog
  2. Langfuse

Installation Method

  • Git Clone
  • Docker

Environment

  • OpenWebUI Version: v0.5.14

Expected Behavior

The system should retrieve the model list without errors.

Actual Behavior

When calling get_all_models(), the system encounters a Connection error: Object of type ModelModel is not JSON serializable.

Steps to Reproduce

  1. Install OpenWebUI v0.5.14.
  2. Start the application and attempt to query models.
  3. Observe the error in the logs.

Logs and Screenshots

INFO  [open_webui.routers.openai] get_all_models()
Connection error: Object of type ModelModel is not JSON serializable
Connection error: Object of type ModelModel is not JSON serializable
Connection error: Object of type ModelModel is not JSON serializable
Image

Additional Information

  • This issue was not present in the previous version (v0.5.12).
  • It seems related to a serialization issue in get_all_models().

Would appreciate any guidance on fixing this issue. Thanks! 🙏 @tjbck

cc: @maycszz

Originally created by @samuelpetermoshi on GitHub (Feb 20, 2025). Original GitHub issue: https://github.com/open-webui/open-webui/issues/10411 **Description:** After updating to OpenWebUI v0.5.14, I encountered an issue where the API throws a `Connection error: Object of type ModelModel is not JSON serializable`. This appears when making requests to retrieve available models. This issue affects the monitoring pipelines for the built-in OpenAI and Ollama models. Due to the error, their data is not being sent to the following monitoring pipelines: 1. Datadog 2. Langfuse --- ## **Installation Method** - Git Clone - Docker ## **Environment** - **OpenWebUI Version:** v0.5.14 ## **Expected Behavior** The system should retrieve the model list without errors. ## **Actual Behavior** When calling `get_all_models()`, the system encounters a `Connection error: Object of type ModelModel is not JSON serializable`. ## **Steps to Reproduce** 1. Install OpenWebUI v0.5.14. 2. Start the application and attempt to query models. 3. Observe the error in the logs. ## **Logs and Screenshots** ```log INFO [open_webui.routers.openai] get_all_models() Connection error: Object of type ModelModel is not JSON serializable Connection error: Object of type ModelModel is not JSON serializable Connection error: Object of type ModelModel is not JSON serializable ``` <img width="1277" alt="Image" src="https://github.com/user-attachments/assets/49022029-b064-4ac6-9bb9-bdcb2a2d6693" /> ## **Additional Information** - This issue was not present in the previous version (v0.5.12). - It seems related to a serialization issue in `get_all_models()`. Would appreciate any guidance on fixing this issue. Thanks! 🙏 @tjbck cc: @maycszz
GiteaMirror commented 2026-05-05 16:24:09 -05:00
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@tjbck commented on GitHub (Feb 20, 2025):

This might already be addressed in dev, testing wanted here!

<!-- gh-comment-id:2670859069 --> @tjbck commented on GitHub (Feb 20, 2025): This might already be addressed in dev, testing wanted here!
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Reference: github-starred/open-webui#54550
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