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GPT-NeoX

Developer tool

by EleutherAI

Library for training large autoregressive language models on GPU clusters.

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Apache-2.0 licensed on the repository page. The name is shared with the GPT-NeoX-20B model trained using it; only the library is a product.

What it does

• Model training

Sources

Pricing

Official documentation · 23 Aug 2026

Apache-2.0 licensed on the repository page. The name is shared with the GPT-NeoX-20B model trained using it; only the library is a product.

Sold within

Official documentation · 30 Sep 2026

The repository is published under the "Apache-2.0 license" — "Licensed under the Apache License, Version 2.0" — with install steps beginning "To install the remaining basic dependencies, run:". No paid offering is named.

Also from EleutherAI

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  Framework for evaluating language models on a common set of benchmark tasks.

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