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Sentence Completion on COPA

92.88AccuracyT5(3B) + PE w/ ROE (ORC.)
42.564855.627468.6981.7526Oct 28, 2022May 10, 2023Nov 21, 2023Jun 3, 2024Dec 14, 2024Jun 27, 2025Jan 8, 2026

Evaluation results

MethodLinks
T5(3B) + PE w/ ROE (ORC.)Backbone=T5 (3B), Expert type=Oracle Retrieval-of-Expert, Additional Parameters=100M2023.0292.88—
GPT-3 (175B)Parameters=175B2023.0291—
T0-11BParams=11B2022.1090.84.1
T0-11BParameters=11B2023.0290.02—
SubZero-GV (LoRA)Optimization Algorithm=SubZero, Tuning Strategy=LoRA, Guiding Vectors=true, Model=OPT-13B2026.0190—
MeZO-GV (Prefix)Optimization Algorithm=MeZO, Tuning Strategy=Prefix Tuning, Guiding Vectors=true, Model=OPT-13B2026.0190—
T5(3B) + Cos PEBackbone=T5 (3B), Expert type=Prompt Expert trained on COSMOS-QA, Additional Parameters=100M2023.0289.63—
ZO-AdaMU (2x)Optimization Algorithm=ZO-AdaMU, Tuning Strategy=Full Tuning, Training Steps=2x, Model=OPT-13B2026.0189—
MeZO-GV (FT)Optimization Algorithm=MeZO, Tuning Strategy=Full Tuning, Guiding Vectors=true, Model=OPT-13B2026.0189—
SubZero-GV (FT)Optimization Algorithm=SubZero, Tuning Strategy=Full Tuning, Guiding Vectors=true, Model=OPT-13B2026.0189—
SubZero (LoRA)Optimization Algorithm=SubZero, Tuning Strategy=LoRA, Guiding Vectors=false, Model=OPT-13B2026.0189—
MeZO-GV (LoRA)Optimization Algorithm=MeZO, Tuning Strategy=LoRA, Guiding Vectors=true, Model=OPT-13B2026.0189—
SubZero-GV (Prefix)Optimization Algorithm=SubZero, Tuning Strategy=Prefix Tuning, Guiding Vectors=true, Model=OPT-13B2026.0189—
ZO-AdaMU (LoRA)Optimization Algorithm=ZO-AdaMU, Tuning Strategy=LoRA, Model=OPT-13B2026.0188—
HiZOOOptimization Algorithm=HiZOO, Tuning Strategy=Full Tuning, Model=OPT-13B2026.0188—
MeZO (FT)Optimization Algorithm=MeZO, Tuning Strategy=Full Tuning, Guiding Vectors=false, Model=OPT-13B2026.0188—
SubZero (FT)Optimization Algorithm=SubZero, Tuning Strategy=Full Tuning, Guiding Vectors=false, Model=OPT-13B2026.0188—
SubZero (Prefix)Optimization Algorithm=SubZero, Tuning Strategy=Prefix Tuning, Guiding Vectors=false, Model=OPT-13B2026.0188—
ICLEvaluation Protocol=In-context Learning, Model=OPT-13B2026.0187—
HiZOO (LoRA)Optimization Algorithm=HiZOO, Tuning Strategy=LoRA, Model=OPT-13B2026.0187—
HiZOO (Prefix)Optimization Algorithm=HiZOO, Tuning Strategy=Prefix Tuning, Model=OPT-13B2026.0187—
MeZO (Prefix)Optimization Algorithm=MeZO, Tuning Strategy=Prefix Tuning, Guiding Vectors=false, Model=OPT-13B2026.0187—
ZO-AdaMU (Prefix)Optimization Algorithm=ZO-AdaMU, Tuning Strategy=Prefix Tuning, Model=OPT-13B2026.0186—
KiC-LargeParams=0.77B2022.1085.36.8
MeZO (LoRA)Optimization Algorithm=MeZO, Tuning Strategy=LoRA, Guiding Vectors=false, Model=OPT-13B2026.0184—
Zero-shotEvaluation Protocol=Zero-shot, Model=OPT-13B2026.0180—
T5(3B) + PE w/ ROEBackbone=T5 (3B), Expert type=Retrieval-of-Expert, Additional Parameters=100M2023.0279.25—
FTOptimization Algorithm=Adam, Tuning Strategy=Full Tuning, Model=OPT-13B2026.0179—
MeZO-GV(FT)Backbone=OPT-1.3B, Optimization Method=MeZO, Adaptation Technique=Fine-tuning, Guiding Vectors (GV)=true2026.0178—
MeZO-GV(LoRA)Backbone=OPT-1.3B, Optimization Method=MeZO, Adaptation Technique=LoRA, Guiding Vectors (GV)=true2026.0176—
T0-3BParameters=3B2023.0275.13—
T0-3BParams=3B2022.1074.98.7
MeZO(LoRA)Backbone=OPT-1.3B, Optimization Method=MeZO, Adaptation Technique=LoRA2026.0174—
MeZO-GV(Prefix)Backbone=OPT-1.3B, Optimization Method=MeZO, Adaptation Technique=Prefix Tuning, Guiding Vectors (GV)=true2026.0174—
T0-LargeParams=0.77B2022.1073.58.4
Zero-shotBackbone=OPT-1.3B, Learning Strategy=Zero-shot2026.0173—
MeZO(FT)Backbone=OPT-1.3B, Optimization Method=MeZO, Adaptation Technique=Fine-tuning2026.0173—
MeZO(Prefix)Backbone=OPT-1.3B, Optimization Method=MeZO, Adaptation Technique=Prefix Tuning2026.0171—
ICLBackbone=OPT-1.3B, Learning Strategy=In-context Learning2026.0169—
T0-BaseParams=0.22B2022.1065.75.7
KiC-BaseParams=0.22B2022.10659
RoBERTaParams=0.35B2022.10562.3
GPT-JParams=6B2022.10564.2
OPTParams=30B2022.10521.9
GPT-NeoParams=2.7B2022.1050.56.3
BERTParams=0.34B2022.10493.1
KiC-SmallParams=0.06B2022.10485.2
GPT-NeoXParams=20B2022.1044.55.8