Add OpenAI price reduction algo support

[yaroslavyaroslav]

This paper promise price reduction up to 40% in complex tasks.

• papaer: https://arxiv.org/abs/2310.03094
• code: https://github.com/MurongYue/LLM_MoT_cascade

@misc{yue2023large,
      title={Large Language Model Cascades with Mixture of Thoughts Representations for Cost-efficient Reasoning}, 
      author={Murong Yue and Jie Zhao and Min Zhang and Liang Du and Ziyu Yao},
      year={2023},
      eprint={2310.03094},
      archivePrefix={arXiv},
      primaryClass={cs.CL}
}