# HTTP Error 429 while running MMLU

**URL:** <https://discuss.huggingface.co/t/http-error-429-while-running-mmlu/167647>\
**Category:** Beginners\
**Created:** [August 22, 2025, 10:33pm UTC](https://discuss.huggingface.co/t/http-error-429-while-running-mmlu/167647 "2025-08-22T22:33:23Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jaydeepb](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/jaydeepb/32/14906_2.png) [@jaydeepb](https://discuss.huggingface.co/u/jaydeepb)\
**Post date:** [August 22, 2025, 10:33pm UTC](https://discuss.huggingface.co/t/http-error-429-while-running-mmlu/167647/1 "2025-08-22T22:33:23Z")

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Hi there. I’m trying to use the MMLU benchmark available at [cais/mmlu · Datasets at Hugging Face](https://huggingface.co/datasets/cais/mmlu) . I have been trying to use it but running into `HTTP Error 429 thrown while requesting HEAD ``https://huggingface.co/datasets/cais/mmlu/resolve/main/README.md`. What could be the reason?

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**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](https://discuss.huggingface.co/u/John6666)\
**Post date:** [August 23, 2025, 12:11am UTC](https://discuss.huggingface.co/t/http-error-429-while-running-mmlu/167647/2 "2025-08-23T00:11:12Z")

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When error 429 occurs, it [may be caused by IPv6](https://discuss.huggingface.co/t/how-does-the-hub-handles-http-error-429/147346/3), [an outdated implementation of the old datasets library](https://github.com/huggingface/datasets/issues/7344#issuecomment-2582422510), or [other factors](https://github.com/huggingface/datasets/issues/7506).

If it is truly an intentional rate limit, I believe only Hugging Face can resolve it…

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<div class="post-metadata">

**Author:** ![jaydeepb](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/jaydeepb/32/14906_2.png) [@jaydeepb](https://discuss.huggingface.co/u/jaydeepb)\
**Post date:** [August 23, 2025, 3:55am UTC](https://discuss.huggingface.co/t/http-error-429-while-running-mmlu/167647/3 "2025-08-23T03:55:14Z")

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> [@John6666](#):
>
> other factors

@John6666 thank you so much! using `huggingface-cli login` with my access token fixed this.

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**Author:** ![system](https://us1.discourse-cdn.com/hellohellohello/original/2X/d/de4155eb4aa4108ecb32a1389d7cc37ae69f88b7.png) [@system](https://discuss.huggingface.co/u/system)\
**Post date:** [August 23, 2025, 3:55pm UTC](https://discuss.huggingface.co/t/http-error-429-while-running-mmlu/167647/4 "2025-08-23T15:55:23Z")

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