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Text-to-Image Generation on Out-of-Domain Evaluation Set

36.25CLIP ScoreFLUX.1-dev + UnifiedReward-Flex
33.23434.01734.835.583Feb 2, 2026

Evaluation results

MethodLinks
FLUX.1-dev + UnifiedReward-FlexBackbone=FLUX.1-dev, Optimization=GRPO, Reward Model=UnifiedReward-Flex, Sampling steps=30, CFG scale=3.52026.0236.2523.423.316.56
FLUX.1-dev + UnifiedReward-ThinkBackbone=FLUX.1-dev, Optimization=GRPO, Reward Model=UnifiedReward-Think, Sampling steps=30, CFG scale=3.52026.0235.8523.383.276.53
FLUX.1-dev + UnifiedRewardBackbone=FLUX.1-dev, Optimization=GRPO, Reward Model=UnifiedReward, Sampling steps=30, CFG scale=3.52026.0234.4323.313.196.44
FLUX.1-devSampling steps=30, CFG scale=3.52026.0234.422.73.076.13
FLUX.1-dev + HPSv3Backbone=FLUX.1-dev, Optimization=GRPO, Reward Model=HPSv3, Sampling steps=30, CFG scale=3.52026.0234.1223.263.146.37
FLUX.1-dev + PickScoreBackbone=FLUX.1-dev, Optimization=GRPO, Reward Model=PickScore, Sampling steps=30, CFG scale=3.52026.0233.6123.783.126.42
FLUX.1-dev + HPSv2Backbone=FLUX.1-dev, Optimization=GRPO, Reward Model=HPSv2, Sampling steps=30, CFG scale=3.52026.0233.3523.123.16.23