# Model fallback configuration - unable to select workspace configured models

**URL:** <https://forum.langchain.com/t/model-fallback-configuration-unable-to-select-workspace-configured-models/4282>\
**Category:** LangSmith Product Help\
**Created:** [August 3, 2026, 10:51am UTC](https://forum.langchain.com/t/model-fallback-configuration-unable-to-select-workspace-configured-models/4282 "2026-08-03T10:51:33Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![sa64r](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.langchain.com/sa64r/32/2191_2.png) [@sa64r](https://forum.langchain.com/u/sa64r)\
**Post date:** [August 3, 2026, 10:51am UTC](https://forum.langchain.com/t/model-fallback-configuration-unable-to-select-workspace-configured-models/4282/1 "2026-08-03T10:51:33Z")

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Hey,

I am working on setting up the LangSmith LLM Gateway. When I am working to configure a fallback route for the models I cannot seem to build the chain as I cannot select any configured models.

I’ve added a screenshot to show what I am looking at:

 ![image](https://canada1.discourse-cdn.com/flex007/uploads/langchain/original/2X/1/125ae4472a5d027a7a65bdcd939d48b8d9d8e850.png)

Also here’s another screenshot showing I have model configurations:

 ![image](https://canada1.discourse-cdn.com/flex007/uploads/langchain/original/2X/5/567c6fd701eab8facd9122adb7fa1911d9c5acf3.png)

Any help would be greatly appreciated!

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<div class="post-metadata">

**Author:** ![pawel-twardziak](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.langchain.com/pawel-twardziak/32/960_2.png) [@pawel-twardziak](https://forum.langchain.com/u/pawel-twardziak)\
**Post date:** [August 3, 2026, 11:57am UTC](https://forum.langchain.com/t/model-fallback-configuration-unable-to-select-workspace-configured-models/4282/2 "2026-08-03T11:57:40Z")

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hi @sa64r

hmm have you tried with an “OpenAI Compatible Endpoint” or “Anthropic” configuration?

All model configurations other than **OpenAI Compatible Endpoint** or **Anthropic** are filtered out of the fallback-chain picker - that’s why it shows up empty. See the [Model fallbacks docs, “Wire formats” section](https://docs.langchain.com/langsmith/llm-gateway-fallbacks#wire-formats):

“Only these two provider types can go in a chain. A model configuration saved for another provider, such as Azure OpenAI or Bedrock, isn’t eligible. To reach a host that speaks the OpenAI API, save it as an OpenAI Compatible Endpoint with its base URL.”

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<div class="post-metadata">

**Author:** ![sa64r](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.langchain.com/sa64r/32/2191_2.png) [@sa64r](https://forum.langchain.com/u/sa64r)\
**Post date:** [August 3, 2026, 12:42pm UTC](https://forum.langchain.com/t/model-fallback-configuration-unable-to-select-workspace-configured-models/4282/4 "2026-08-03T12:42:36Z")

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Created this config and still do not see the model appearing in the UI for selection

 ![image](https://canada1.discourse-cdn.com/flex007/uploads/langchain/original/2X/1/1ad7e4272a48fcad25154b338c71d31073684eae.png)

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<div class="post-metadata">

**Author:** ![pawel-twardziak](https://yyz1.discourse-cdn.com/flex007/user_avatar/forum.langchain.com/pawel-twardziak/32/960_2.png) [@pawel-twardziak](https://forum.langchain.com/u/pawel-twardziak)\
**Post date:** [August 3, 2026, 1:17pm UTC](https://forum.langchain.com/t/model-fallback-configuration-unable-to-select-workspace-configured-models/4282/5 "2026-08-03T13:17:39Z")

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this one, not “Open AI”:

 ![image](https://canada1.discourse-cdn.com/flex007/uploads/langchain/original/2X/c/cbebba9d6904fb3d4562c61793783b5d8e2b02fc.png)