Struct GenerationConfig 

pub struct GenerationConfig {
    pub temperature: Option<f32>,
    pub max_output_tokens: Option<i32>,
    pub top_p: Option<f32>,
    pub top_k: Option<i32>,
    pub thinking_level: Option<ThinkingLevel>,
    pub seed: Option<i64>,
    pub stop_sequences: Option<Vec<String>>,
    pub thinking_summaries: Option<ThinkingSummaries>,
    pub tool_choice: Option<FunctionCallingMode>,
    pub speech_config: Option<SpeechConfig>,
}

Generation configuration for model behavior

Fields

temperature: Option<f32>

max_output_tokens: Option<i32>

top_p: Option<f32>

top_k: Option<i32>

thinking_level: Option<ThinkingLevel>

Thinking level for chain-of-thought reasoning

seed: Option<i64>

Seed for deterministic output generation.

Using the same seed with identical inputs will produce the same output, useful for testing and debugging.

stop_sequences: Option<Vec<String>>

Stop sequences that halt generation.

When the model generates any of these sequences, generation stops immediately.

thinking_summaries: Option<ThinkingSummaries>

Controls whether thinking summaries are included in output.

Use with thinking_level to control reasoning output.

tool_choice: Option<FunctionCallingMode>

Controls function calling behavior.

This field determines how the model uses declared tools/functions:

• Auto (default): Model decides whether to call functions
• Any: Model must call a function
• None: Function calling is disabled
• Validated: Ensures schema adherence for both function calls and natural language

speech_config: Option<SpeechConfig>

Speech configuration for text-to-speech audio output.

Required when using AUDIO response modality.

Trait Implementations

impl Clone for GenerationConfig

fn clone(&self) -> GenerationConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for GenerationConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for GenerationConfig

fn default() -> GenerationConfig

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for GenerationConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for GenerationConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.