# 400 Model Error - Call to LLM Failed

**URL:** <https://community.openai.com/t/400-model-error-call-to-llm-failed/276375>\
**Category:** ChatGPT\
**Tags:** chatgpt\
**Created:** [June 23, 2023, 12:27pm UTC](https://community.openai.com/t/400-model-error-call-to-llm-failed/276375 "2023-06-23T12:27:20Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kajasherief12345](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/kajasherief12345/32/160131_2.png) [@kajasherief12345](https://community.openai.com/u/kajasherief12345)\
**Post date:** [June 23, 2023, 12:27pm UTC](https://community.openai.com/t/400-model-error-call-to-llm-failed/276375/1 "2023-06-23T12:27:20Z")

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All of a sudden, I got the following error couple of times, Can anyone please help me to understand why this error occurs.

400, message=‘model\_error’, u r l =   
Call to LLM failed.

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<div class="post-metadata">

**Author:** ![michal.zastocki](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/michal.zastocki/32/146765_2.png) [@michal.zastocki](https://community.openai.com/u/michal.zastocki)\
**Post date:** [June 28, 2023, 10:57am UTC](https://community.openai.com/t/400-model-error-call-to-llm-failed/276375/2 "2023-06-28T10:57:59Z")

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We have the same error.  
We noticed that it appears when you increase “Max response” parameter above ~3000.