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GRUE
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IC-849
GPT-2 and T5-base exhibit vanishing expected gradients under RFT for inputs with small reward standard deviation, prevalent in 3 of 7 GRUE datasets, causing RFT to underperform SFT
[builds-on]
IC-849
GPT-2 and T5-base exhibit vanishing expected gradients under RFT for inputs with small reward standard deviation, prevalent in 3 of 7 GRUE datasets, causing RFT to underperform SFT
[eval]
IC-850
A partial SFT phase (40% of steps, 1% of samples) before RFT allows GPT-2 and T5-base to reach 96% of the reward achieved with full SFT+RFT, by reducing the number of inputs with vanishing gradients
[builds-on]