[Research] Can we possibly get access to large language models (PaLM 540B, etc) like GPT-3 but no cost?

(I only want to do inference, I don't need to finetune it.)

I want to use very-large language model (#parameters > 100B) to do some experiments, is that true the only very-large language model we can get access to is GPT3 API? Can we possibly get access to PaLM and Flan-PaLM 540B with no cost by chance?

I have searched over the internet but can't find a definite answer. As GPT-3 pricing for text-davinci-2 is not cheap, I am wondering …

cost gpt gpt-3 language language models large language models machinelearning palm research