GenerationConfigFrequencyPenalty Property

Optional. Frequency penalty applied to the next token's logprobs, multiplied by the number of times each token has been seen in the response so far. A positive penalty will discourage the use of tokens that have already been used, proportional to the number of times the token has been used: The more a token is used, the more difficult it is for the model to use that token again, increasing the vocabulary of responses. Caution: A *negative* penalty will encourage the model to reuse tokens proportional to the number of times the token has been used. Small negative values will reduce the vocabulary of a response. Larger negative values will cause the model to start repeating a common token until it hits the MaxOutputTokens limit.

public double? FrequencyPenalty { get; set; }