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Add English evaluation battery (lm-evaluation-harness 0.4.12, zero-shot + 5-shot MMLU)

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@@ -172,6 +172,32 @@ understates them. For scale rather than ranking: RoLlama2-7b-Base reports a 42.0
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  four-task accuracy average against this model's 34.12 -- from a model 5x larger
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  trained on far more data.
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  Also measured: CORE metric 0.2450 on the base model (0.1608 at step 2,000), and
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  0.3021 validation bits-per-byte for the instruct checkpoint against 0.5113 for the
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  base model it started from.
 
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  four-task accuracy average against this model's 34.12 -- from a model 5x larger
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  trained on far more data.
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+ **English suite**, base checkpoint, EleutherAI lm-evaluation-harness **0.4.12**,
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+ zero-shot except where marked, full test sets, scored by likelihood over the
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+ options -- the standard method for base models, so these are comparable to
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+ published tables produced at the same settings:
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+
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+ | task | accuracy | normalised | chance |
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+ |---|---:|---:|---:|
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+ | sciq | **77.8** | 73.3 | 25.0 |
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+ | hellaswag | 37.7 | **46.5** | 25.0 |
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+ | piqa | 61.6 | **61.6** | 50.0 |
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+ | boolq | **58.1** | -- | ~50 |
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+ | arc_easy | **43.0** | 41.8 | 25.0 |
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+ | lambada_openai | 34.5 | -- | -- |
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+ | winogrande | 52.5 | -- | 50.0 |
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+ | arc_challenge | 23.9 | 27.9 | 25.0 |
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+ | openbookqa | 16.6 | 26.0 | 25.0 |
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+ | mmlu (5-shot) | 26.7 | -- | 25.0 |
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+
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+ The same reading rule applies: judge against the chance column. Science QA,
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+ sentence completion and physical common sense are clearly learned; winogrande,
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+ arc_challenge, openbookqa and mmlu are at or near chance; and lambada is the weakest
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+ skill, consistent with English being the minority share of an 11.68B-token
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+ budget. For scale rather than ranking: on the completion tasks this sits
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+ between Pythia-410M and Pythia-1B -- models that saw roughly 40x more English
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+ text.
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+
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  Also measured: CORE metric 0.2450 on the base model (0.1608 at step 2,000), and
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  0.3021 validation bits-per-byte for the instruct checkpoint against 0.5113 for the
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  base model it started from.