model_type ????

from langchain_community.llms import CTransformers

Change the model_type to 'llama'

llm = CTransformers(
model='./mamba-2.8b-f32.gguf',
model_type='?????????',
config={'max_new_tokens': 256, 'repetition_penalty': 1.1}
)

print(llm.invoke('AI is going to'))