Pythia is the first LLM suite designed specifically to enable scientific research on LLMs. To learn more see https://github.com/EleutherAI/pythia

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Large language models, scaling laws, AI Alignment, democratization of DL
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Welcome to EleutherAI's HuggingFace page. We are a non-profit research lab focused on interpretability, alignment, and ethics of artificial intelligence. Our open source models are hosted here on HuggingFace.
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Collections
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models
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EleutherAI/SmolLM2-1.7B-magpie-ultra-v1.0-full-dataset
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EleutherAI/SmolLM2-1.7B-magpie-ultra-v1.0-loss-lowest
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EleutherAI/SmolLM2-1.7B-magpie-ultra-v1.0-loss
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EleutherAI/SmolLM2-1.7B-magpie-ultra-v1.0-attribution-lowest
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EleutherAI/SmolLM2-1.7B-magpie-ultra-v0.1-attribution
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EleutherAI/SmolLM2-1.7B-magpie-ultra-v1.0-attribution
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EleutherAI/SmolLM2-1.7B-magpie-ultra-v0.1-attribution-lowest
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EleutherAI/pkm-coders
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EleutherAI/gemmascope-transcoders-sparsify-cache-1m
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EleutherAI/gemmascope-transcoders-sparsify
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datasets
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EleutherAI/filtering-pretraining-mix_20250516-0250
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410M
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EleutherAI/filtering-annealing-mix_20250507-012346
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89M
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EleutherAI/SmolLM2-1.7B-stage-4-100B
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88M
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235
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EleutherAI/SmolLM2-1.7B-stage-4-20B
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17.6M
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EleutherAI/SmolLM2-1.7B-stage-4-10B
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EleutherAI/filtering-pretraining-mix
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410M
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EleutherAI/SmolLM2-135M-10B
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10.1M
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EleutherAI/filtering-pretraining-mix-formatted
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EleutherAI/SmolLM2-135M-20B
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20.1M
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467
EleutherAI/SmolLM2-135M-100B
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101M
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