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What works

Loader	Loading 1 LoRA	Loading 2 or more LoRAs	Training LoRAs	Multimodal extension	Perplexity evaluation
Transformers	✅	❌	✅*	✅	✅
ExLlama_HF	✅	❌	❌	❌	✅
ExLlamav2_HF	✅	✅	❌	❌	✅
ExLlama	✅	❌	❌	❌	use ExLlama_HF
ExLlamav2	✅	✅	❌	❌	use ExLlamav2_HF
AutoGPTQ	✅	❌	❌	✅	✅
GPTQ-for-LLaMa	✅	❌	✅	✅	✅
llama.cpp	❌	❌	❌	❌	use llamacpp_HF
llamacpp_HF	❌	❌	❌	❌	✅
ctransformers	❌	❌	❌	❌	❌

❌ = not implemented

✅ = implemented

** Training LoRAs with GPTQ models also works with the Transformers loader. Make sure to check "auto-devices" and "disable_exllama" before loading the model.